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.
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Affected Vendors & Products
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History
Fri, 30 Oct 2026 21:30:00 +0000
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ssvc
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Wed, 28 Oct 2026 16:45:00 +0000
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Happyseafox
Happyseafox sail |
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Happyseafox
Happyseafox sail |
Wed, 28 Oct 2026 13:30:00 +0000
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| 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. | |
| Title | SAIL: WebP decoder division by zero through malformed animated canvas metadata | |
| Weaknesses | CWE-369 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-10-28T13:17:29.214Z
Updated: 2026-10-29T18:39:38.355Z
Reserved: 2026-07-07T18:49:15.608Z
Link: CVE-2026-59959
Updated: 2026-10-29T18:39:33.827Z
Status : Deferred
Published: 2026-10-28T14:17:05.240
Modified: 2026-10-29T19:17:25.170
Link: CVE-2026-59959
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