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CVE-2026-27145VulnerabilityPublished Updated

SUSE · Security update for go1.26

Affects SUSESource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-27145· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium : upgrade SUSE x509 to 1.26.4 or 1.25.11 when convenient.

Data as of 10 Nov 2026, 20:06 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.26.4, 1.25.11
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade crypto/x509 to 1.26.4 or 1.25.11.

Affected software

ProductAffectedFixed in
Go standard librarycrypto/x509Affected
  • >=1.26.0-0 <1.26.4
Fixed in
  • 1.26.4
Go standard librarycrypto/x509Affected
  • <1.25.11
Fixed in
  • 1.25.11
Gocrypto/x509pkg:golang/crypto/x509Other threatsAffected
  • <1.25.11
  • >=1.26.0-0 <1.26.4
Fixed in
  • 1.25.11
  • 1.26.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This update for go1.26 fixes the following issues Update to go1.26.4 (bsc#1255111): - CVE-2026-27145: crypto/x509: split candidate hostname only once (bsc#1267450). - CVE-2026-42504: mime: quadratic complexity in WordDecoder.DecodeHeader (bsc#1267442). - CVE-2026-42507: net/textproto: arbitrary input are included in errors without any escaping (bsc#1267444). Changes: * go#79230 go#79217 boo#1267442 security: fix CVE-2026-42504 mime: quadratic complexity in WordDecoder.DecodeHeader * go#79426 go#79346 boo#1267444 security: fix CVE-2026-42507 net/textproto: arbitrary input are included in errors without any escaping * go#79701 go#79694 boo#1267450 security: fix CVE-2026-27145 crypto/x509: split candidate hostname only once * go#79191 cmd/compile: Bug in rewrite rules for AMD64 causes SHL instruction overflow and miscompilation * go#79226 crypto/internal/fips140/drbg: backport CL 774221 to Go 1.26 * go#79349 cmd/fix: x/tools/go/analysis/passes/modernize: slicescontains hoists needle expression, changing side effect count * go#79686 runtime/race: change in 93a4f03 leads to a failed build on Amazon Linux 2 and arm64

References

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