CVE-2026-27137

Aliases:GO-2026-4599BIT-golang-2026-27137
Advisory lineage Upstream: 0 Downstream: 24
Analyzed
Published: 06 Mar 2026, 21:28
Last modified:10 Mar 2026, 13:32

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 Mar 2026, 21:28
Published
Vulnerability first disclosed
10 Mar 2026, 13:32
Last Modified
Vulnerability information updated

Description

When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 4%

Techniques & Countermeasures

  • CWE-295•Improper Certificate Validation

    The product does not validate, or incorrectly validates, a certificate.

Affected Systems

  • go standard library•crypto/x509

    ≥ 1.26.0-0, < 1.26.1

  • golang•go

    1.26.0

  • Go•stdlib

    ≥ 1.26.0-0, < 1.26.1

References (4)