CVE-2026-42309
medium
CVSS v3
5.5
CVSS v2
—
VIR risk
5.5
Description
Pillow has a heap buffer overflow with nested list coordinates
Predictions
Exploit likelihood
55%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-42309
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-42309.html
Vendor advisory: security-advisories@github.com — https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xmw-vc9v-4wf2
Vendor advisory: security-advisories@github.com — https://github.com/python-pillow/Pillow/releases/tag/12.2.0
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 12.2.0-1 |
| debian | sid | fixed | 12.2.0-1 |
| debian | trixie | fixed | 0 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| python | pillow | {"startIncluding":"11.2.1","endExcluding":"12.2.0"} | 12.2.0 |
References
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xmw-vc9v-4wf2
- https://nvd.nist.gov/vuln/detail/CVE-2026-42309
- https://github.com/python-pillow/Pillow
- https://github.com/python-pillow/Pillow/releases/tag/12.2.0
- https://www.suse.com/security/cve/CVE-2026-42309.html
- https://security-tracker.debian.org/tracker/CVE-2026-42309
- https://github.com/advisories/GHSA-5xmw-vc9v-4wf2
CWEs
CWE-122
Verify integrity in audit chain (admin only). AS-IS.