CVE-2026-59959 - SAIL: WebP decoder division by zero through malformed animated canvas metadata

CVE-2026-59959 - SAIL: WebP decoder division by zero through malformed animated canvas metadata

https://cvefeed.io/rssfeed/latest.atom / Wed, 10/28/2026 - 16:12
CVE ID :CVE-2026-59959
Published : Oct. 28, 2026, 1:17 p.m. | 1 hour, 6 minutes ago
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.
Severity: 0.0 | NA
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