Pillow: From 11.2.1 until 13.0.0, Arrow export assumes that an image's rows are tightly contiguous and exports from
Affects pillowSource GCVE Database
Not known to be exploited · CVSS 6.3 Medium : upgrade to 13.0.0 when convenient.
Data as of 28 Oct 2026, 11:12 UTC
- Patch
- Available – fixed in 13.0.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 21 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade pillow to 13.0.0.
Patches and advisories
Affected software
| Product | Affected | Fixed in |
|---|---|---|
PyPIpillowpkg:pypi/pillowOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
Pillow is a Python imaging library. From 11.2.1 until 13.0.0, Arrow export assumes that an image's rows are tightly contiguous and exports from im->blocks[0].ptr even when PILLOW_ALIGNMENT makes aligned_linesize include row padding or an aligned offset before the first row. The resulting Arrow buffer can include uninitialized padding, bytes preceding the first row, or stale heap contents from previously freed images. Applications that configure alignment and export images to Arrow can therefore disclose one user's pixels or other process memory to another user. This issue is fixed in version 13.0.0.
References
- github.com/python-pillow/Pillow/releases/tag/13.0.0 (opens in a new tab)
- github.com/python-pillow/Pillow/security/advisories/GHSA-654x-cwwv-5j9c (opens in a new tab)
- github.com/python-pillow/Pillow/pull/10172 (opens in a new tab)
- github.com/python-pillow/Pillow/commit/19f64946eb247b973dd4560be7dea3bf979d2e6a (opens in a new tab)