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Vulnerabilities

Vulnerability · CVE-2026-91059

The GUIX JPEG software decoder enforces no ordering on JPEG markers.

Published Oct 20, 2026 · catalog updated Oct 20, 2026 · The GUIX JPEG software

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-91059. EPSS is 0.16%. Act only if a listed version of The GUIX JPEG software is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The GUIX JPEG software).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.16%
Remediation
Advisory link
Affected products
See sources for product scope

The GUIX JPEG software decoder enforces no ordering on JPEG markers. A file that places a second frame header after re-runs the frame header parser after the output buffer has already been allocated and its geometry latched. The decoder returns and publishes a whose reported dimensions and exceed the allocation behind it. Any consumer that trusts the returned structure reads out of bounds, including GUIX's own display drivers, reached through the ordinary draw path. Reproduces in the shipped default configuration; is enabled by default.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-91059

  • No stored fix

    No vendor fix text is stored. Use the linked advisory before you change production.

  • Version check

    No version range is stored, so an installed version cannot be checked on this page.

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-91059. EPSS is 0.16%. Act only if a listed version of The GUIX JPEG software is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-125: Out-of-bounds Read. EPSS 0.16%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 20, 2026 · NIST NVD

    Detected

    The GUIX JPEG software decoder enforces no ordering on JPEG markers. A file that places a second frame header after re-runs the frame header parser after the output buffer has already been allocated and its geometry latched. The decoder returns and publishes a whose reported dimensions and exceed the allocation behind it. Any consumer that trusts the returned structure reads out of bounds, includi

  2. Oct 20, 2026 · NIST NVD

    Updated

    The GUIX JPEG software decoder enforces no ordering on JPEG markers. A file that places a second frame header after re-runs the frame header parser after the output buffer has already been allocated and its geometry latched. The decoder returns and publishes a whose reported dimensions and exceed the allocation behind it. Any consumer that trusts the returned structure reads out of bounds, includi

  3. Oct 20, 2026 · NIST NVD

    Updated

    The GUIX JPEG software decoder enforces no ordering on JPEG markers. A file that places a second frame header after re-runs the frame header parser after the output buffer has already been allocated and its geometry latched. The decoder returns and publishes a whose reported dimensions and exceed the allocation behind it. Any consumer that trusts the returned structure reads out of bounds, includi

Sources

  • CVE.orgVulnerability recordCVE-2026-91059

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-91059

    30-day exploitation probability 0.16%

    first.org
  • NIST NVDVulnerability recordCVE-2026-91059

    The GUIX JPEG software decoder enforces no ordering on JPEG markers. A file that places a second frame header after re-runs the frame header parser after the output buffer has already been allocated and its geometry latched. The decoder returns and publi

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 21, 2026
  • NIST NVDOct 21, 2026