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CVE-2026-39821VulnerabilityPublished Updated

SUSE · Security update for yq

Affects SUSESource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-39821· Critical 9.6

Not known to be exploited · CVSS 9.6 Critical · fixed in SUSE package updates : patch SUSE http as a priority.

Data as of 10 Nov 2026, 20:06 UTC

CVSS 3.1 base score
9.6Critical
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.27.0-rc.3, 1.26.6, 1.25.13 +1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 May 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 net/http and net/http/internal/http2 to 1.27.0-rc.3, 1.26.6 or 1.25.13; golang.org/x/net/idna to 0.55.0.

Affected software

ProductAffectedFixed in
Go standard librarynet/httpAffected
  • >=1.27.0-0 <1.27.0-rc.3
Fixed in
  • 1.27.0-rc.3
Go standard librarynet/httpAffected
  • >=1.26.0-0 <1.26.6
Fixed in
  • 1.26.6
Go standard librarynet/httpAffected
  • <1.25.13
Fixed in
  • 1.25.13
Go standard librarynet/http/internal/http2Affected
  • >=1.27.0-0 <1.27.0-rc.3
Fixed in
  • 1.27.0-rc.3
Go standard librarynet/http/internal/http2Affected
  • >=1.26.0-0 <1.26.6
Fixed in
  • 1.26.6
Go standard librarynet/http/internal/http2Affected
  • <1.25.13
Fixed in
  • 1.25.13

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

Description

This update for yq fixes the following issues: Changes in yq: - Update the golang.org/x/net dependency to version v0.57.0 to fix CVE-2026-39821 for good (bsc#1267199). - update to v4.53.3 Add --ini-preserve-quotes flag for INI round-trip quote preservation. Fix: reset INI decoder state on init. Fix: decode properties array bracket paths. Fix: preserve floats with trailing zero when encoding YAML to JSON. Fix: JSON to TOML root scope and null handling. Fix: reset TOML decoder finished flag on Init for multi-doc evaluation. Fix: reset TOML decoder between files when evaluating all at once. Fix: preserve TOML inline table array scope. Fix: preserve empty TOML arrays in tables Fix: TOML encoder uses inline tables for YAML FlowStyle mappings. Fix nested inline YAML merge explode. Fix repeatString overflow test on 32-bit platforms. - Fix CVE-2026-56852 (GO-2026-5970) (bsc#1271994): A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes.

References

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