Integer overflow in Mrnanko Webp4j
CVE-2026-3707
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (4.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
- Mrnanko Webp4j — versions 1.0, 1.1, 1.2
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- github.com/MrNanko/webp4j/issues/6 (issue-tracking)
- github.com/MrNanko/webp4j/issues/6 (issue-tracking)
- github.com/Sp1d3rL1/Webp4j-Heap-Buffer-Overflow/blob/main/README.EN.md (exploit)
- github.com/MrNanko/webp4j/commit/89771b201c66d15d29e4cc016d8aae82b6a5fbe1 (patch)
- github.com/MrNanko/webp4j/ (product)
Frequently asked questions
- What is CVE-2026-3707?
- CVE-2026-3707 is a medium-severity vulnerability in Mrnanko Webp4j, classified under CWE-189. CVSS score: 5.3/10. Published 2026-03-08.
- How severe is CVE-2026-3707?
- Medium severity. CVSS v3 base score is 5.3 out of 10.