Out-of-bounds Write Affecting pillow package, versions [,13.0.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-PILLOW-21431000
- published22 Oct 2026
- disclosed21 Oct 2026
- creditNicholas Carlini
Introduced: 21 Oct 2026
NewCVE-2026-96778 (opens in a new tab)How to fix?
Upgrade pillow to version 13.0.0 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write via the JPEG COM marker encoding path in JpegEncode.c, when a JPEG image carrying an oversized comment in its im.info metadata is re-encoded. The comment length is not validated before being written as a COM marker, allowing a comment that exceeds the maximum marker size to overflow the output buffer. An attacker who can supply a JPEG file with an excessively long embedded comment can trigger this condition, leading to memory corruption with potential for arbitrary code execution.