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01 Record

CVE-2026-27137

Incorrect enforcement of email constraints in crypto/x509

HighPUBLISHEDCNA: Go
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

Incorrect enforcement of email constraints 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.
  • 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
0.63% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 49.5% 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 2026-09-16.
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
2026-03-06 21:28Z7 MO AGO
Last updated
2026-09-18 12:04Z1 MO AGO
Reserved
2026-02-17
Assigning CNA
Go
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
  • CWE-295Improper Certificate ValidationBase
Data version
5.2
Document digest
a1f3125361e02ff757e4a3edbb90a096a4578fbf1e82b289cc1bbf00a47ff836

05 Affected products

VendorProductVersionsPlatforms
Go standard librarycrypto/x5091.26.0-0 to < 1.26.1—

06 References

07 Fixed in

AlmaLinux 9

  • go-toolset
    Fixed in 1.26.2-1.el9_8
  • golang
    Fixed in 1.26.2-1.el9_8
  • golang-bin
    Fixed in 1.26.2-1.el9_8
  • golang-docs
    Fixed in 1.26.2-1.el9_8
  • golang-misc
    Fixed in 1.26.2-1.el9_8
  • golang-race
    Fixed in 1.26.2-1.el9_8
  • golang-src
    Fixed in 1.26.2-1.el9_8
  • golang-tests
    Fixed in 1.26.2-1.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

  • delve
    Fixed in 1.25.2-3.el10_1
  • go-toolset
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-bin
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-docs
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-misc
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-race
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-src
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-tests
    Fixed in 1.26.2-2.el10_2.alma.1

Source: 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 1.26.2-1.el9_8
  • golang
    Fixed in 1.26.2-1.el9_8
  • golang-bin
    Fixed in 1.26.2-1.el9_8
  • golang-docs
    Fixed in 1.26.2-1.el9_8
  • golang-misc
    Fixed in 1.26.2-1.el9_8
  • golang-race
    Fixed in 1.26.2-1.el9_8
  • golang-src
    Fixed in 1.26.2-1.el9_8
  • golang-tests
    Fixed in 1.26.2-1.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

  • delve
    Fixed in 1.25.2-3.el10_1
  • go-toolset
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-bin
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-docs
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-misc
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-race
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-src
    Fixed in 1.26.2-2.el10_2.alma.1
  • golang-tests
    Fixed in 1.26.2-2.el10_2.alma.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 14

  • golang-1.26
    Fixed in 1.26.1-1

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.