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CVE-2026-46603— Excessive memory allocation during VP8L decoding in golang.org/x/image

Quick assessment

Affected
golang.org/x/image golang.org/x/image/vp8l
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 golang.org/x/image/vp8l 模块中，VP8L 解码器在处理包含大量未使用的霍夫曼树组（Huffman tree groups）的精心构造的 VP8L 图像时，可能分配过量内存。攻击者可利用此漏洞通过耗尽系统内存引发远程拒绝服务（DoS）。

AI Predicted 5.3 Difficulty: Easy EPSS 0.42% · P35

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
golang.org/x/image golang.org/x/image/vp8l < 0.45.0 affected
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I. Basic Information for CVE-2026-46603

Vulnerability Information
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Vulnerability Title
Excessive memory allocation during VP8L decoding in golang.org/x/image
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
golang.org/x/image golang.org/x/image/vp8l 0 ~ 0.45.0 -

II. Public POCs for CVE-2026-46603

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III. Intelligence Information for CVE-2026-46603

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Patches & Fixes for CVE-2026-46603 (2)

Vendor Advisories for CVE-2026-46603 (1)

IV. Related Vulnerabilities

Same vendor: golang.org/x/image

V. Comments for CVE-2026-46603

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