What’s Vulnerable › Vulnerabilities

CVE-2026-3707: MrNanko webp4j gif_decoder.c DecodeGifFromMemory integer overflow

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-08 · updated 2026-06-17
• Weakness: CWE-189

Description

A vulnerability was identified in MrNanko webp4j up to 1.3.x. The affected element is the function DecodeGifFromMemory of the file src/main/c/gif_decoder.c. Such manipulation of the argument canvas_height leads to integer overflow. Local access is required to approach this attack. The exploit is publicly available and might be used. The name of the patch is 89771b201c66d15d29e4cc016d8aae82b6a5fbe1. It is advisable to implement a patch to correct this issue.

Affected products

• MrNanko webp4j: 1.0, 1.1, 1.2, 1.3

References

• https://github.com/MrNanko/webp4j/
• https://github.com/MrNanko/webp4j/commit/89771b201c66d15d29e4cc016d8aae82b6a5fbe1
• https://github.com/MrNanko/webp4j/issues/6
• https://github.com/MrNanko/webp4j/issues/6#issuecomment-3941945014
• https://github.com/Sp1d3rL1/Webp4j-Heap-Buffer-Overflow/blob/main/README.EN.md
• https://vuldb.com/?ctiid.349653
• https://vuldb.com/?id.349653
• https://vuldb.com/?submit.765972

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