CVE catalog
CVE-2026-112898
Pillow is a Python imaging library. From 9.1.0 until 13.0.0, Pillow can disclose uninitialized stack memory when Image.quantize() uses an empty palette. ImagingPaletteCacheUpdate() leaves a local cach
- Severity
- Medium · CVSS 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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 9.1.0 until 13.0.0, Pillow can disclose uninitialized stack memory when Image.quantize() uses an empty palette. ImagingPaletteCacheUpdate() leaves a local cache array uninitialized when the palette has zero entries, and the conversion path emits those bytes as output pixel indices. An attacker who controls the palette image can obtain stack contents from a returned PNG or GIF. This can disclose addresses and stack-canary data without an out-of-bounds access, memory corruption, or process crash. 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-2026-112898 | 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://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_12230-1.json]
- [https://github.com/python-pillow/Pillow/commit/13943c8f857b22f073d30f0ef9b725a0d255f1a4]
- [https://github.com/python-pillow/Pillow/releases/tag/13.0.0]
- [https://github.com/python-pillow/Pillow/security/advisories/GHSA-rfgq-q3w2-pmv2]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-112898]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-112898]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-112898]
- [https://security-tracker.debian.org/tracker/CVE-2026-112898]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-112898.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]