Use After Free Affecting libpng package, versions [1.5.30,1.6.57)
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-CONAN-LIBPNG-15991613
- published12 Apr 2026
- disclosed9 Apr 2026
- creditIv4n
Introduced: 9 Apr 2026
NewCVE-2026-34757 (opens in a new tab)How to fix?
Upgrade libpng to version 1.6.57 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the png_set_PLTE, png_set_tRNS, and png_set_hIST functions. An attacker can cause corrupted chunk metadata or leak heap contents by passing a pointer obtained from png_get_PLTE, png_get_tRNS, or png_get_hIST back into the corresponding setter on the same structure, leading to reading from freed memory and copying its contents into a replacement buffer.