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TI-2021-21548 Aliases CVE-2021-46880GHSA-j4x4-2cc8-7274

x509/x509_verify.c in LibreSSL before 3.4.2, and OpenBSD before 7.0 errata 006, allows…

Priority MEDIUM 50CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-295.

Summary

x509/x509_verify.c in LibreSSL before 3.4.2, and OpenBSD before 7.0 errata 006, allows authentication bypass because an error for an unverified certificate chain is sometimes discarded.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00568 47th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:openbsd:libressl:*:*:*:*:*:*:*:*before 3.4.2VulnerableOpenBSD
cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*before 7.0VulnerableOpenBSD
  • cpe:2.3:a:openbsd:libressl:*:*:*:*:*:*:*:* Versions before 3.4.2 Vulnerable ·OpenBSD
  • cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:* Versions before 7.0 Vulnerable ·OpenBSD

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-46880
  2. 2026-10-03 Alias added: GHSA-j4x4-2cc8-7274

References

Patch 2

Other 2

  • TI-2023-17874 A double free or use after free could occur after SSL_clear in OpenBSD 7.2 before errata… CVSS 3.1CRITICAL 9.8
  • TI-2015-04488 Out-of-bounds write in LibreSSL CVSS 3.1CRITICAL 9.8
  • TI-2015-04487 Uncontrolled resource consumption in LibreSSL CVSS 3.1HIGH 7.5
  • TI-2014-07651 Double free vulnerability in the ssl_parse_clienthello_use_srtp_ext function in d1_srtp.c… CVSS 2.0HIGH 7.5
  • TI-2018-06502 The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0… CVSS 3.0HIGH 7.4
  • TI-2019-15189 LibreSSL 2.9.1 through 3.2.1 has an out-of-bounds read in asn1_item_print_ctx (called from asn1_template_print_ctx). CVSS 3.1HIGH 7.1
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences