CVE-2026-1837

HIGH

7.5

Description

A specially-crafted file can cause libjxl's decoder to write pixel data to uninitialized unallocated memory. Soon after that data from another uninitialized unallocated region is copied to pixel data. This can be done by requesting color transformation of grayscale images to another grayscale color space. Buffers allocated for 1-float-per-pixel are used as if they are allocated for 3-float-per-pixel. That happens only if LCMS2 is used as CMS engine. There is another CMS engine available (selected by build flags).

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/11/2026

Last Modified4/14/2026

Sourcenvd

Honeypot Sightings0

Affected Products

libjxl_project:libjxl

Weaknesses (CWE)

CWE-805CWE-770

References

https://github.com/libjxl/libjxl/issues/4549(cve-coordination@google.com)

https://github.com/libjxl/libjxl/issues/4549(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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