CVE-2026-1526
undici is vulnerable to Unbounded Memory Consumption in undici WebSocket permessage-deflate Decompression
02 Description
undici is vulnerable to Unbounded Memory Consumption in undici WebSocket permessage-deflate Decompression
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.
- EPSS probability
- 1.19% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 68.0% 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 2026-09-04.
- 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
- 2026-03-12 20:08Z7 MO AGO
- Last updated
- 2026-09-14 12:04Z1 MO AGO
- Reserved
- 2026-01-28
- Assigning CNA
- openjs
- 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
- 43721e4bdf24ad0dfb464bf983bd7e2912b74b809e601cb3e1bb8398851f86ea
05 Affected products
06 References
- github.comhttps://github.com/nodejs/undici/security/advisories/GHSA-vrm6-8vpv-qv8q
- hackerone.comhttps://hackerone.com/reports/3481206
- cna.openjsf.orghttps://cna.openjsf.org/security-advisories.html
- datatracker.ietf.orghttps://datatracker.ietf.org/doc/html/rfc7692
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-1526
- bugzilla.redhat.comRHBZ#2447142https://bugzilla.redhat.com/show_bug.cgi?id=2447142
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1526.json
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:17789
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7310
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7080
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7675
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7123
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7670
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7983
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7302
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7350
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:34342
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:9742
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:13826
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:5807
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:21772
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:21931
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:56431
07 Fixed in
AlmaLinux 8
- nodejs 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-devel 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-docs 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-full-i18n 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-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+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
- 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
- npm Fixed
A version is affected if any line below covers it.
- 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
- nodejs Fixed in 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
- nodejs-devel Fixed in 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
- nodejs-docs Fixed in 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
- nodejs-full-i18n Fixed in 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 in 3.0.3-3.module_el9.7.0+209+ecf6523e
- nodejs-packaging Fixed in 2021.06-6.module_el9.7.0+209+ecf6523e
- nodejs-packaging-bundler Fixed in 2021.06-6.module_el9.7.0+198+8bf605ba
- npm Fixed in 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
- 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
- nodejs 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-devel 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-docs 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-full-i18n 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-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+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
- 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
- npm Fixed
A version is affected if any line below covers it.
- 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
- nodejs Fixed in 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
- nodejs-devel Fixed in 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
- nodejs-docs Fixed in 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
- nodejs-full-i18n Fixed in 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 in 3.0.3-3.module_el9.7.0+209+ecf6523e
- nodejs-packaging Fixed in 2021.06-6.module_el9.7.0+209+ecf6523e
- nodejs-packaging-bundler Fixed in 2021.06-6.module_el9.7.0+198+8bf605ba
- npm Fixed in 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
- 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 13
- node-undici No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- node-undici Fixed in 7.24.5+dfsg+~cs3.2.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- node-undici No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- node-undici No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- node-undici No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- node-undici No fix yet
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.