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01 Record

CVE-2026-27145

Inefficient candidate hostname parsing in crypto/x509

MediumPUBLISHEDCNA: Go
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
View raw JSON

02 Description

Inefficient candidate hostname parsing in crypto/x509

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.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • 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
0.59% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 48.1% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
NVD analysis status
Undergoing Analysis. NVD last modified this record on 2026-09-18.
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
2026-06-02 22:01Z4 MO AGO
Last updated
2026-09-18 12:04Z1 MO AGO
Reserved
2026-02-17
Assigning CNA
Go
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Weaknesses
  • CWE-606Unchecked Input for Loop ConditionBase
Data version
5.2
Document digest
2ace61886db45fb5c1bc2035586b81fb5c09f16c1c855c0cc05875984af6056a

05 Affected products

VendorProductVersionsPlatforms
Go standard librarycrypto/x5090 to < 1.25.11, 1.26.0-0 to < 1.26.4—

06 References

07 Fixed in

AlmaLinux 8

  • delve
    Fixed in 1.26.1-1.module_el8.10.0+4223+bd807c2e
  • go-toolset
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-bin
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-docs
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-misc
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-race
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-src
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-tests
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e

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

AlmaLinux 9

  • go-toolset
    Fixed in 1.26.4-1.el9_8
  • golang
    Fixed in 1.26.4-1.el9_8
  • golang-bin
    Fixed in 1.26.4-1.el9_8
  • golang-docs
    Fixed in 1.26.4-1.el9_8
  • golang-misc
    Fixed in 1.26.4-1.el9_8
  • golang-race
    Fixed in 1.26.4-1.el9_8
  • golang-src
    Fixed in 1.26.4-1.el9_8
  • golang-tests
    Fixed in 1.26.4-1.el9_8
  • opentelemetry-collector
    Fixed in 0.152.1-1.el9_8
  • skopeo
    Fixed in 2:1.22.2-7.el9_8
  • skopeo-tests
    Fixed in 2:1.22.2-7.el9_8

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

AlmaLinux 10

  • go-fdo-client
    Fixed in 1.0.0-4.el10_2.5
  • go-fdo-server
    Fixed in 1.0.1-2.el10_2.3
  • go-fdo-server-manufacturer
    Fixed in 1.0.1-2.el10_2.3
  • go-fdo-server-owner
    Fixed in 1.0.1-2.el10_2.3
  • go-fdo-server-rendezvous
    Fixed in 1.0.1-2.el10_2.3
  • go-toolset
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-bin
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-docs
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-misc
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-race
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-src
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-tests
    Fixed in 1.26.4-1.el10_2.alma.1
  • ipp-usb
    Fixed in 0.9.27-7.el10_2.2
  • opentelemetry-collector
    Fixed in 0.152.1-1.el10_2
  • yggdrasil
    Fixed in 0.4.9.2-1.el10_2
  • yggdrasil-devel
    Fixed in 0.4.9.2-1.el10_2

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

CloudLinux 8

  • delve
    Fixed in 1.26.1-1.module_el8.10.0+4223+bd807c2e
  • go-toolset
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-bin
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-docs
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-misc
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-race
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-src
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e
  • golang-tests
    Fixed in 1.26.5-1.module_el8.10.0+4223+bd807c2e

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

  • go-toolset
    Fixed in 1.26.4-1.el9_8
  • golang
    Fixed in 1.26.4-1.el9_8
  • golang-bin
    Fixed in 1.26.4-1.el9_8
  • golang-docs
    Fixed in 1.26.4-1.el9_8
  • golang-misc
    Fixed in 1.26.4-1.el9_8
  • golang-race
    Fixed in 1.26.4-1.el9_8
  • golang-src
    Fixed in 1.26.4-1.el9_8
  • golang-tests
    Fixed in 1.26.4-1.el9_8
  • opentelemetry-collector
    Fixed in 0.152.1-1.el9_8
  • skopeo
    Fixed in 2:1.22.2-7.el9_8
  • skopeo-tests
    Fixed in 2:1.22.2-7.el9_8

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

  • go-fdo-client
    Fixed in 1.0.0-4.el10_2.5
  • go-fdo-server
    Fixed in 1.0.1-2.el10_2.3
  • go-fdo-server-manufacturer
    Fixed in 1.0.1-2.el10_2.3
  • go-fdo-server-owner
    Fixed in 1.0.1-2.el10_2.3
  • go-fdo-server-rendezvous
    Fixed in 1.0.1-2.el10_2.3
  • go-toolset
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-bin
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-docs
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-misc
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-race
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-src
    Fixed in 1.26.4-1.el10_2.alma.1
  • golang-tests
    Fixed in 1.26.4-1.el10_2.alma.1
  • ipp-usb
    Fixed in 0.9.27-7.el10_2.2
  • opentelemetry-collector
    Fixed in 0.152.1-1.el10_2
  • yggdrasil
    Fixed in 0.4.9.2-1.el10_2
  • yggdrasil-devel
    Fixed in 0.4.9.2-1.el10_2

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

  • golang-1.19
    No fix yet

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

Debian 13

  • golang-1.24
    No fix yet

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

Debian 14

  • golang-1.26
    Fixed in 1.26.4-1

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

Ubuntu 22.04 LTS

  • golang-1.24
    No fix yet
  • golang-1.25
    No fix yet
  • golang-1.26
    No fix yet

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

Ubuntu 24.04 LTS

  • golang-1.24
    No fix yet
  • golang-1.25
    No fix yet
  • golang-1.26
    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

  • golang-1.24
    No fix yet
  • golang-1.25
    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

  • golang-1.24
    No fix yet
  • golang-1.25
    No fix yet
  • golang-1.26
    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

  • golang-1.26
    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.