CVE-2026-42500

Panic when reading out of bound palette index in golang.org/x/image/bmp

State: Published
Severity: 5.3 Medium
Published: May 29, 2026
Updated: May 29, 2026
Reserved: Apr 28, 2026

Description

Decoding a paletted BMP file with an out-of-range palette index results in a panic when accessing pixels in the invalid image.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
golang.org/x/image/bmpgolang.org/x/image	before 0.41.0Affected

References

https://go.dev/issue/79576
https://groups.google.com/g/golang-announce/c/uhYX90BlBvI
https://go.dev/cl/781500
https://pkg.go.dev/vuln/GO-2026-5031

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