Vulnerability Description
SAIL is a cross-platform library for loading and saving images with support for animation, metadata, and ICC profiles. Prior to version 1.0.2, the built-in WebP decoder can crash during loader initialization when processing a malformed animated WebP file with inconsistent container or `ANMF` frame metadata. In `sail_codec_load_init_v8_webp()` in `src/sail-codecs/webp/webp.c`, `WebPDemuxGetI` with `WEBP_FF_CANVAS_WIDTH` can return a zero `image_local->width`, which is then used as a divisor when calculating `bytes_per_pixel` from the image row size. The division happens before frame decoding and before generic image skeleton validation in `src/sail/sail_advanced.c`, causing an arithmetic fault and process termination. Applications accepting untrusted WebP images can consequently suffer denial of service; builds must include the affected WebP codec. This issue is fixed in version 1.0.2.
Related Weaknesses (CWE)
References
- https://github.com/HappySeaFox/sail/commit/495660135a4c62e416a1b357a4381dd300692
- https://github.com/HappySeaFox/sail/security/advisories/GHSA-5g8g-g347-84m8
- https://github.com/HappySeaFox/sail/tree/v1.0.2
- https://github.com/HappySeaFox/sail/security/advisories/GHSA-5g8g-g347-84m8
FAQ
What is CVE-2026-59959?
CVE-2026-59959 is a documented vulnerability. SAIL is a cross-platform library for loading and saving images with support for animation, metadata, and ICC profiles. Prior to version 1.0.2, the built-in WebP decoder can crash during loader initial...
How severe is CVE-2026-59959?
CVSS scoring is not yet available for CVE-2026-59959. Check NVD for updates.
Is there a patch for CVE-2026-59959?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.