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01 Record

CVE-2026-27135

nghttp2 Denial of service: Assertion failure due to the missing state validation

HighPUBLISHEDCNA: GitHub_M
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
View raw JSON

02 Description

nghttp2 Denial of service: Assertion failure due to the missing state validation

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.80% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 56.4% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-10-15.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-03-18 17:59Z7 MO AGO
Last updated
2026-10-15 01:15Z15 DAYS AGO
Reserved
2026-02-17
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
Data version
5.2
Document digest
314aef63598e41a5de0c2bda25e6394bbbb73ff44be47dbfbf0e57648a65e5cf

05 Affected products

VendorProductVersionsPlatforms
nghttp2nghttp2< 1.68.1—

06 References

07 Fixed in

AlmaLinux 8

  • libnghttp2
    Fixed in 1.33.0-6.el8_10.2
  • libnghttp2-devel
    Fixed in 1.33.0-6.el8_10.2
  • nghttp2
    Fixed in 1.33.0-6.el8_10.2
  • nodejs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el8.10.0+4165+3f200bda
    • Affected before 1:22.22.2-1.module_el8.10.0+4158+e796f37f
    • Affected before 1:24.14.1-2.module_el8.10.0+4160+4819ac42
  • nodejs-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el8.10.0+4165+3f200bda
    • Affected before 1:22.22.2-1.module_el8.10.0+4158+e796f37f
    • Affected before 1:24.14.1-2.module_el8.10.0+4160+4819ac42
  • nodejs-docs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el8.10.0+4165+3f200bda
    • Affected before 1:22.22.2-1.module_el8.10.0+4158+e796f37f
    • Affected before 1:24.14.1-2.module_el8.10.0+4160+4819ac42
  • nodejs-full-i18n
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el8.10.0+4165+3f200bda
    • Affected before 1:22.22.2-1.module_el8.10.0+4158+e796f37f
    • Affected before 1:24.14.1-2.module_el8.10.0+4160+4819ac42
  • nodejs-libs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:22.22.2-1.module_el8.10.0+4158+e796f37f
    • Affected before 1:24.14.1-2.module_el8.10.0+4160+4819ac42
  • nodejs-nodemon
    Fixed

    A version is affected if any line below covers it.

    • Affected before 3.0.1-1.module_el8.10.0+3982+85c136aa
    • Affected before 3.0.1-1.module_el8.10.0+4006+3c416519
    • Affected before 3.0.3-1.module_el8.10.0+4061+f8ceeab9
  • nodejs-packaging
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2021.06-6.module_el8.10.0+4086+70facd4a
    • Affected before 2021.06-6.module_el8.10.0+4158+e796f37f
    • Affected before 2021.06-6.module_el8.10.0+4165+3f200bda
  • nodejs-packaging-bundler
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2021.06-6.module_el8.10.0+4086+70facd4a
    • Affected before 2021.06-6.module_el8.10.0+4158+e796f37f
    • Affected before 2021.06-6.module_el8.10.0+4165+3f200bda
  • npm
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:10.8.2-1.20.20.2.1.module_el8.10.0+4165+3f200bda
    • Affected before 1:10.9.7-1.22.22.2.1.module_el8.10.0+4158+e796f37f
    • Affected before 1:11.11.0-1.24.14.1.2.module_el8.10.0+4160+4819ac42
  • v8-12.4-devel
    Fixed in 3:12.4.254.21-1.22.22.2.1.module_el8.10.0+4158+e796f37f
  • v8-13.6-devel
    Fixed in 3:13.6.233.17-1.24.14.1.2.module_el8.10.0+4160+4819ac42

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • libnghttp2
    Fixed in 1.43.0-6.el9_7.1
  • libnghttp2-devel
    Fixed in 1.43.0-6.el9_7.1
  • nghttp2
    Fixed in 1.43.0-6.el9_7.1
  • nodejs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el9.7.0+226+88d36870
    • Affected before 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
  • nodejs-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el9.7.0+224+0af7cc6b
    • Affected before 1:20.20.2-1.module_el9.7.0+226+88d36870
    • Affected before 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
  • nodejs-docs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el9.7.0+224+0af7cc6b
    • Affected before 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
  • nodejs-full-i18n
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el9.7.0+224+0af7cc6b
    • Affected before 1:20.20.2-1.module_el9.7.0+226+88d36870
    • Affected before 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
  • nodejs-libs
    Fixed in 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
  • nodejs-nodemon
    Fixed

    A version is affected if any line below covers it.

    • Affected before 3.0.1-1.module_el9.5.0+125+8dc38870
    • Affected before 3.0.3-3.module_el9.7.0+209+ecf6523e
  • nodejs-packaging
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2021.06-6.module_el9.7.0+209+ecf6523e
    • Affected before 2021.06-6.module_el9.7.0+226+88d36870
  • nodejs-packaging-bundler
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2021.06-6.module_el9.7.0+198+8bf605ba
    • Affected before 2021.06-6.module_el9.7.0+226+88d36870
  • npm
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:10.8.2-1.20.20.2.1.module_el9.7.0+224+0af7cc6b
    • Affected before 1:10.8.2-1.20.20.2.1.module_el9.7.0+226+88d36870
    • Affected before 1:11.11.0-1.24.14.1.2.module_el9.7.0+222+ef1c61e1
  • v8-13.6-devel
    Fixed in 3:13.6.233.17-1.24.14.1.2.module_el9.7.0+222+ef1c61e1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 10

  • libnghttp2
    Fixed in 1.64.0-2.el10_1.1
  • libnghttp2-devel
    Fixed in 1.64.0-2.el10_1.1
  • nghttp2
    Fixed in 1.64.0-2.el10_1.1
  • nodejs-docs
    Fixed in 1:22.22.2-1.el10_1
  • nodejs24-docs
    Fixed in 1:24.14.1-2.el10_1
  • nodejs24-npm
    Fixed in 1:11.11.0-1.24.14.1.2.el10_1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • libnghttp2
    Fixed in 1.33.0-6.el8_10.2
  • libnghttp2-devel
    Fixed in 1.33.0-6.el8_10.2
  • nghttp2
    Fixed in 1.33.0-6.el8_10.2
  • nodejs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el8.10.0+4165+3f200bda
    • Affected before 1:22.22.2-1.module_el8.10.0+4158+e796f37f
    • Affected before 1:24.14.1-2.module_el8.10.0+4160+4819ac42
  • nodejs-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el8.10.0+4165+3f200bda
    • Affected before 1:22.22.2-1.module_el8.10.0+4158+e796f37f
    • Affected before 1:24.14.1-2.module_el8.10.0+4160+4819ac42
  • nodejs-docs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el8.10.0+4165+3f200bda
    • Affected before 1:22.22.2-1.module_el8.10.0+4158+e796f37f
    • Affected before 1:24.14.1-2.module_el8.10.0+4160+4819ac42
  • nodejs-full-i18n
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el8.10.0+4165+3f200bda
    • Affected before 1:22.22.2-1.module_el8.10.0+4158+e796f37f
    • Affected before 1:24.14.1-2.module_el8.10.0+4160+4819ac42
  • nodejs-libs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:22.22.2-1.module_el8.10.0+4158+e796f37f
    • Affected before 1:24.14.1-2.module_el8.10.0+4160+4819ac42
  • nodejs-nodemon
    Fixed

    A version is affected if any line below covers it.

    • Affected before 3.0.1-1.module_el8.10.0+3982+85c136aa
    • Affected before 3.0.1-1.module_el8.10.0+4006+3c416519
    • Affected before 3.0.3-1.module_el8.10.0+4061+f8ceeab9
  • nodejs-packaging
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2021.06-6.module_el8.10.0+4086+70facd4a
    • Affected before 2021.06-6.module_el8.10.0+4158+e796f37f
    • Affected before 2021.06-6.module_el8.10.0+4165+3f200bda
  • nodejs-packaging-bundler
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2021.06-6.module_el8.10.0+4086+70facd4a
    • Affected before 2021.06-6.module_el8.10.0+4158+e796f37f
    • Affected before 2021.06-6.module_el8.10.0+4165+3f200bda
  • npm
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:10.8.2-1.20.20.2.1.module_el8.10.0+4165+3f200bda
    • Affected before 1:10.9.7-1.22.22.2.1.module_el8.10.0+4158+e796f37f
    • Affected before 1:11.11.0-1.24.14.1.2.module_el8.10.0+4160+4819ac42
  • v8-12.4-devel
    Fixed in 3:12.4.254.21-1.22.22.2.1.module_el8.10.0+4158+e796f37f
  • v8-13.6-devel
    Fixed in 3:13.6.233.17-1.24.14.1.2.module_el8.10.0+4160+4819ac42

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • libnghttp2
    Fixed in 1.43.0-6.el9_7.1
  • libnghttp2-devel
    Fixed in 1.43.0-6.el9_7.1
  • nghttp2
    Fixed in 1.43.0-6.el9_7.1
  • nodejs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el9.7.0+226+88d36870
    • Affected before 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
  • nodejs-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el9.7.0+224+0af7cc6b
    • Affected before 1:20.20.2-1.module_el9.7.0+226+88d36870
    • Affected before 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
  • nodejs-docs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el9.7.0+224+0af7cc6b
    • Affected before 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
  • nodejs-full-i18n
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:20.20.2-1.module_el9.7.0+224+0af7cc6b
    • Affected before 1:20.20.2-1.module_el9.7.0+226+88d36870
    • Affected before 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
  • nodejs-libs
    Fixed in 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
  • nodejs-nodemon
    Fixed

    A version is affected if any line below covers it.

    • Affected before 3.0.1-1.module_el9.5.0+125+8dc38870
    • Affected before 3.0.3-3.module_el9.7.0+209+ecf6523e
  • nodejs-packaging
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2021.06-6.module_el9.7.0+209+ecf6523e
    • Affected before 2021.06-6.module_el9.7.0+226+88d36870
  • nodejs-packaging-bundler
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2021.06-6.module_el9.7.0+198+8bf605ba
    • Affected before 2021.06-6.module_el9.7.0+226+88d36870
  • npm
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:10.8.2-1.20.20.2.1.module_el9.7.0+224+0af7cc6b
    • Affected before 1:10.8.2-1.20.20.2.1.module_el9.7.0+226+88d36870
    • Affected before 1:11.11.0-1.24.14.1.2.module_el9.7.0+222+ef1c61e1
  • v8-13.6-devel
    Fixed in 3:13.6.233.17-1.24.14.1.2.module_el9.7.0+222+ef1c61e1

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 10

  • libnghttp2
    Fixed in 1.64.0-2.el10_1.1
  • libnghttp2-devel
    Fixed in 1.64.0-2.el10_1.1
  • nghttp2
    Fixed in 1.64.0-2.el10_1.1
  • nodejs-docs
    Fixed in 1:22.22.2-1.el10_1
  • nodejs24-docs
    Fixed in 1:24.14.1-2.el10_1
  • nodejs24-npm
    Fixed in 1:11.11.0-1.24.14.1.2.el10_1

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • nghttp2
    Fixed in 1.52.0-1+deb12u3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • nghttp2
    Fixed in 1.64.0-1.1+deb13u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • nghttp2
    Fixed in 1.68.1-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • nghttp2
    Fixed in 1.43.0-1ubuntu0.3

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • nghttp2
    Fixed in 1.59.0-1ubuntu0.3

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 25.10

  • nghttp2
    Fixed in 1.64.0-1.1ubuntu1.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • nghttp2
    Fixed in 1.68.0-2ubuntu0.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • nghttp2
    Fixed in 1.7.1-1ubuntu0.1~esm3
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • nghttp2
    Fixed in 1.30.0-1ubuntu1+esm3
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • nghttp2
    Fixed in 1.40.0-1ubuntu0.3+esm1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.