Interpretation Conflict Affecting libpng package, versions <1.6.58-r1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ALPINE323-LIBPNG-16752333
- published19 May 2026
- disclosed4 Jun 2026
Introduced: 19 May 2026
CVE-2026-40930 (opens in a new tab)How to fix?
Upgrade Alpine:3.23 libpng to version 1.6.58-r1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libpng package and not the libpng package as distributed by Alpine.
See How to fix? for Alpine:3.23 relevant fixed versions and status.
LIBPNG is a reference library for use in applications that process PNG (Portable Network Graphics) raster image files. In version 1.8.0, three inter-frame chunk discard paths in the push-mode APNG parser clear the chunk-header flag without consuming the chunk body and CRC, allowing attacker-controlled bytes inside an ignored ancillary chunk to be reinterpreted as a fresh chunk header on the next call to png_process_data. Commit faf06924688b62d7c1654b5ceddedbde66ffadb4 fixes the issue.