CVE catalog
CVE-2026-40930
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 par
- Severity
- Medium · CVSS 5.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.20% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libpng1.6 | sid | 1.6.59-1 | fixed |
| Debian | libpng1.6 | forky | 1.6.59-1 | fixed |
| Debian | libpng1.6 | trixie | 1.6.48-1+deb13u5 | fixed |
| Debian | libpng1.6 | trixie-security | 1.6.48-1+deb13u6 | fixed |
| Debian | libpng1.6 | bookworm | 1.6.39-2+deb12u5 | fixed |
| Debian | libpng1.6 | bookworm-security | 1.6.39-2+deb12u6 | fixed |
| Alpine | libpng | 3.21 | 1.6.59-r0 | fixed |
| Alpine | libpng | 3.22 | 1.6.59-r0 | fixed |
| Alpine | libpng | 3.23 | 1.6.58-r1 | fixed |
| Alpine | libpng | 3.24 | 1.6.58-r1 | fixed |
| Ubuntu | libpng1.6 | pro | 1.6.37-1 | vulnerable |
| Ubuntu | libpng1.6 | pro | 1.6.37-2 | vulnerable |
| Ubuntu | libpng1.6 | pro | 1.6.37-2ubuntu0.1~esm1 | vulnerable |
| Ubuntu | libpng1.6 | pro | 1.6.37-2ubuntu0.1~esm2 | vulnerable |
| Ubuntu | libpng1.6 | pro | 1.6.37-2ubuntu0.1~esm3 | fixed |
| Ubuntu | libpng1.6 | 22.04 | 1.6.37-3build4 | vulnerable |
| Ubuntu | libpng1.6 | 22.04 | 1.6.37-3build5 | vulnerable |
| Ubuntu | libpng1.6 | 22.04 | 1.6.37-3ubuntu0.1 | vulnerable |
| Ubuntu | libpng1.6 | 22.04 | 1.6.37-3ubuntu0.3 | vulnerable |
| Ubuntu | libpng1.6 | 22.04 | 1.6.37-3ubuntu0.4 | vulnerable |
| Ubuntu | libpng1.6 | 22.04 | 1.6.37-3ubuntu0.5 | vulnerable |
| Ubuntu | libpng1.6 | 22.04 | 1.6.37-3ubuntu0.6 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libpng1.6 | source | sid | 1.6.37-4 | not yet assigned | Not reported | Not reported |
| Debian | libpng1.6 | source | forky | 1.6.37-4 | not yet assigned | Not reported | Not reported |
| Debian | libpng1.6 | source | trixie | 1.6.37-4 | not yet assigned | Not reported | Not reported |
| Debian | libpng1.6 | source | bookworm | 1.6.37-4 | not yet assigned | Not reported | Not reported |
| Alpine | libpng | apk | 3.21 | 1.6.59-r0 | Not reported | ALPINE-CVE-2026-40930 | Not reported |
| Alpine | libpng | apk | 3.22 | 1.6.59-r0 | Not reported | ALPINE-CVE-2026-40930 | Not reported |
| Alpine | libpng | apk | 3.23 | 1.6.58-r1 | Not reported | ALPINE-CVE-2026-40930 | Not reported |
| Alpine | libpng | apk | 3.24 | 1.6.58-r1 | Not reported | ALPINE-CVE-2026-40930 | Not reported |
| Ubuntu | libpng1.6 | deb | pro | 1.6.37-2ubuntu0.1~esm3 | Not reported | UBUNTU-CVE-2026-40930 | Not reported |
| Ubuntu | libpng1.6 | deb | 22.04 | 1.6.37-3ubuntu0.6 | Not reported | UBUNTU-CVE-2026-40930 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libpng16-16]Fixed
Source package: [libpng1.6]
Details (4)
1.6.39-2+deb12u5· amd64 · bookwormFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
1.6.39-2+deb12u5· arm64 · bookwormFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
1.6.39-2+deb12u5· amd64 · bookworm-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
1.6.39-2+deb12u5· arm64 · bookworm-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
- [libpng-dev]Fixed
Source package: [libpng1.6]
Details (4)
1.6.39-2+deb12u5· amd64 · bookwormFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
1.6.39-2+deb12u5· arm64 · bookwormFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
1.6.39-2+deb12u5· amd64 · bookworm-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
1.6.39-2+deb12u5· arm64 · bookworm-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
- [libpng-tools]Fixed
Source package: [libpng1.6]
Details (4)
1.6.39-2+deb12u5· amd64 · bookwormFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
1.6.39-2+deb12u5· arm64 · bookwormFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
1.6.39-2+deb12u5· amd64 · bookworm-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
1.6.39-2+deb12u5· arm64 · bookworm-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · bookworm; nvd · libpng1.6 · debian · 12
[Debian 13 (Trixie)]
- [libpng16-16t64]Fixed
Source package: [libpng1.6]
Details (5)
1.6.48-1+deb13u5· amd64 · trixieFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u5· arm64 · trixieFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u5· amd64 · trixie-security · Historical versionFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u5· arm64 · trixie-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u6· amd64 · trixie-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
- [libpng-dev]Fixed
Source package: [libpng1.6]
Details (5)
1.6.48-1+deb13u5· amd64 · trixieFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u5· arm64 · trixieFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u5· amd64 · trixie-security · Historical versionFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u5· arm64 · trixie-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u6· amd64 · trixie-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
- [libpng-tools]Fixed
Source package: [libpng1.6]
Details (5)
1.6.48-1+deb13u5· amd64 · trixieFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u5· arm64 · trixieFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u5· amd64 · trixie-security · Historical versionFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u5· arm64 · trixie-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
1.6.48-1+deb13u6· amd64 · trixie-securityFixed · Fixed:
1.6.37-4nvd · libpng1.6 · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-40930]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-40930]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-40930]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-40930]
- [https://security-tracker.debian.org/tracker/CVE-2026-40930]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40930.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1559.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]