CVE catalog
CVE-2026-112399
Pillow is a Python imaging library. From 8.1.0 until 13.0.0, Pillow can allocate an APNG disposal background at the full canvas size before applying the decompression-bomb check. A crafted APNG with a
- Severity
- High · CVSS 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.39% · Oct 25, 2026
Pillow is a Python imaging library. From 8.1.0 until 13.0.0, Pillow can allocate an APNG disposal background at the full canvas size before applying the decompression-bomb check. A crafted APNG with a small first frame, a very large declared canvas, and background disposal or first-frame OP_PREVIOUS reaches PngImageFile._seek while Image.open() positions frame zero. The full-canvas allocation occurs inside Image.open() without requiring pixel loading or frame iteration. This can exhaust memory and deny service. This issue is fixed in version 13.0.0.
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 | pillow | sid | 13.0.0-1 | fixed |
| Debian | pillow | forky | 12.3.0-1 | vulnerable |
| Debian | pillow | trixie | 11.1.0-5+deb13u4 | vulnerable |
| Debian | pillow | trixie-security | 11.1.0-5+deb13u3 | vulnerable |
| Debian | pillow | bookworm | 9.4.0-1.1+deb12u1 | vulnerable |
| Debian | pillow | bookworm-security | 9.4.0-1.1+deb12u1 | vulnerable |
| Ubuntu | pillow | pro | 6.1.0-1 | vulnerable |
| Ubuntu | pillow | pro | 6.1.0-1build1 | vulnerable |
| Ubuntu | pillow | pro | 6.2.1-2 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4build1 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4ubuntu0.1 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4ubuntu0.2 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4ubuntu0.3 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4ubuntu0.4 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4ubuntu0.5 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4ubuntu0.6 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4ubuntu0.7 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4ubuntu0.8 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4ubuntu0.9 | vulnerable |
| Ubuntu | pillow | pro | 7.0.0-4ubuntu0.9+esm1 | vulnerable |
| Ubuntu | pillow-python2 | pro | 6.2.1-3~build1 | vulnerable |
| Ubuntu | pillow-python2 | pro | 6.2.1-3 | vulnerable |
| Ubuntu | pillow-python2 | pro | 6.2.1-3ubuntu0.1~esm1 | vulnerable |
| Ubuntu | pillow-python2 | pro | 6.2.1-3ubuntu0.1~esm2 | vulnerable |
| Ubuntu | pillow | 22.04 | 8.1.2+dfsg-0.3 | vulnerable |
| Ubuntu | pillow | 22.04 | 9.0.0-1 | vulnerable |
| Ubuntu | pillow | 22.04 | 9.0.1-1 | vulnerable |
| Ubuntu | pillow | 22.04 | 9.0.1-1build1 | vulnerable |
| Ubuntu | pillow | 22.04 | 9.0.1-1ubuntu0.1 | vulnerable |
| Ubuntu | pillow | 22.04 | 9.0.1-1ubuntu0.2 | vulnerable |
| Ubuntu | pillow | 22.04 | 9.0.1-1ubuntu0.3 | vulnerable |
| Ubuntu | pillow | 22.04 | 9.0.1-1ubuntu0.4 | vulnerable |
| Ubuntu | pillow | 22.04 | 9.0.1-1ubuntu0.5 | vulnerable |
| Ubuntu | pillow | 24.04 | 10.0.0-1 | vulnerable |
| Ubuntu | pillow | 24.04 | 10.1.0-1 | vulnerable |
| Ubuntu | pillow | 24.04 | 10.2.0-1 | vulnerable |
| Ubuntu | pillow | 24.04 | 10.2.0-1build1 | vulnerable |
| Ubuntu | pillow | 24.04 | 10.2.0-1ubuntu1 | vulnerable |
| Ubuntu | pillow | 24.04 | 10.2.0-1ubuntu1.2 | vulnerable |
| Ubuntu | pillow | 24.04 | 10.2.0-1ubuntu1.3 | vulnerable |
| Ubuntu | pillow | 26.10 | 12.1.1-2ubuntu1 | vulnerable |
| Ubuntu | pillow | 26.10 | 12.3.0-1ubuntu1 | vulnerable |
| Ubuntu | pillow | 26.04 | 11.3.0-1ubuntu1 | vulnerable |
| Ubuntu | pillow | 26.04 | 11.3.0-1ubuntu2 | vulnerable |
| Ubuntu | pillow | 26.04 | 12.0.0-1ubuntu1 | vulnerable |
| Ubuntu | pillow | 26.04 | 12.1.1-1ubuntu1 | vulnerable |
| Ubuntu | pillow | 26.04 | 12.1.1-2ubuntu1 | vulnerable |
| Ubuntu | pillow | 26.04 | 12.1.1-2ubuntu1.1 | vulnerable |
| Ubuntu | pillow | 26.04 | 12.1.1-2ubuntu1.2 | vulnerable |
| Ubuntu | pillow | 26.04 | 12.1.1-2ubuntu1.3 | vulnerable |
| Cpe | pillow | Not reported | 13.0.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | pillow | source | sid | 13.0.0-1 | not yet assigned | Not reported | Not reported |
| Debian | pillow | source | forky | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | pillow | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | pillow | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Cpe | pillow | cpe | Not reported | 13.0.0 | Not reported | NVD-CVE-2026-112399 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-pil]Affected
Source package: [pillow]
Details (4)
9.4.0-1.1+deb12u1· amd64 · bookwormAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
9.4.0-1.1+deb12u1· arm64 · bookwormAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
9.4.0-1.1+deb12u1· amd64 · bookworm-securityAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
9.4.0-1.1+deb12u1· arm64 · bookworm-securityAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
- [python3-pil.imagetk]Affected
Source package: [pillow]
Details (4)
9.4.0-1.1+deb12u1· amd64 · bookwormAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
9.4.0-1.1+deb12u1· arm64 · bookwormAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
9.4.0-1.1+deb12u1· amd64 · bookworm-securityAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
9.4.0-1.1+deb12u1· arm64 · bookworm-securityAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
- [python-pil-doc]Affected
Source package: [pillow]
Details (4)
9.4.0-1.1+deb12u1· all · bookwormAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
9.4.0-1.1+deb12u1· all · bookwormAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
9.4.0-1.1+deb12u1· all · bookworm-securityAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
9.4.0-1.1+deb12u1· all · bookworm-securityAffected
nvd · pillow · debian · bookworm; nvd · pillow · debian · 12
[Debian 13 (Trixie)]
- [python3-pil]Affected
Source package: [pillow]
Details (4)
11.1.0-5+deb13u4· amd64 · trixieAffected
nvd · pillow · debian · 13
11.1.0-5+deb13u4· arm64 · trixieAffected
nvd · pillow · debian · 13
11.1.0-5+deb13u3· amd64 · trixie-securityAffected
nvd · pillow · debian · 13
11.1.0-5+deb13u3· arm64 · trixie-securityAffected
nvd · pillow · debian · 13
- [python3-pil.imagetk]Affected
Source package: [pillow]
Details (4)
11.1.0-5+deb13u4· amd64 · trixieAffected
nvd · pillow · debian · 13
11.1.0-5+deb13u4· arm64 · trixieAffected
nvd · pillow · debian · 13
11.1.0-5+deb13u3· amd64 · trixie-securityAffected
nvd · pillow · debian · 13
11.1.0-5+deb13u3· arm64 · trixie-securityAffected
nvd · pillow · debian · 13
- [python-pil-doc]Affected
Source package: [pillow]
Details (4)
11.1.0-5+deb13u4· all · trixieAffected
nvd · pillow · debian · 13
11.1.0-5+deb13u4· all · trixieAffected
nvd · pillow · debian · 13
11.1.0-5+deb13u3· all · trixie-securityAffected
nvd · pillow · debian · 13
11.1.0-5+deb13u3· all · trixie-securityAffected
nvd · pillow · debian · 13
Observed:
References
- [https://github.com/python-pillow/Pillow/commit/f1acfc54c53502948d0d14121872061df931db48]
- [https://github.com/python-pillow/Pillow/releases/tag/13.0.0]
- [https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xm2-6676-qcp9]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-112399]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-112399]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-112399]
- [https://security-tracker.debian.org/tracker/CVE-2026-112399]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-112399.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]