| Name | CVE-2026-34757 |
| Description | Use-after-free in `png_set_PLTE`, `png_set_tRNS` and `png_set_hIST` leading to corrupted chunk data and potential heap information disclosure |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1133051 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libpng1.6 (PTS) | bullseye | 1.6.37-3 | vulnerable |
| bullseye (security) | 1.6.37-3+deb11u3 | vulnerable |
| bookworm | 1.6.39-2+deb12u1 | vulnerable |
| bookworm (security) | 1.6.39-2+deb12u4 | vulnerable |
| trixie | 1.6.48-1+deb13u3 | vulnerable |
| trixie (security) | 1.6.48-1+deb13u4 | vulnerable |
| forky, sid | 1.6.56-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libpng1.6 | source | (unstable) | (unfixed) | | | 1133051 |
Notes
https://github.com/pnggroup/libpng/security/advisories/GHSA-6fr7-g8h7-v645
Fixed by: https://github.com/pnggroup/libpng/commit/398cbe3df03f4e11bb031e07f416dfdde3684e8a (v1.6.57)
Followup: https://github.com/pnggroup/libpng/commit/55d20aaa322c9274491cda82c5cd4f99b48c6bcc (v1.6.57)