Excessive memory allocation during VP8L decoding in golang.org/x/image (CVE-2026-46603) | HOL Guard CVE

High · CVSS 7.5CVE-2026-46603

Excessive memory allocation during VP8L decoding in golang.org/x/image

Answer in brief

CVE-2026-46603 records a High severity (CVSS 7.5) vulnerability in Excessive memory allocation during VP8L decoding in golang.org/x/image. The current sources do not mark it as known exploited. The current feed maps golang.org/x/image/golang.org/x/image/vp8l (generic), golang.org/x/image (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 14, 2026Updated Sep 3, 2026Source checked Sep 28, 2026First seen by HOL Aug 14, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps golang.org/x/image/golang.org/x/image/vp8l (generic), golang.org/x/image (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
golang.org/x/image/golang.org/x/image/vp8lgeneric	>=0 <0.45.0	0.45.0
golang.org/x/imagego	>=0 <0.45.0	0.45.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for golang.org/x/image/golang.org/x/image/vp8l, golang.org/x/image.
Review the reported fix. Update golang.org/x/image/golang.org/x/image/vp8l to 0.45.0; golang.org/x/image to 0.45.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 14, 2026

Sources and claim methodology

Upstream source description

VP8L decoding in golang.org/x/image/vp8l can allocate an excessive amount of memory when processing a crafted VP8L image containing many unused Huffman tree groups. This allows a remote attacker to cause a denial of service via memory exhaustion.

Quoted source text, attributed separately from HOL analysis.