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CVE-2026-42311 is a high severity vulnerability with a CVSS score of 7.8. No known exploits currently, and patches are available.
Very low probability of exploitation
EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.
Processing a malicious PSD file could lead to memory corruption, potentially resulting in a crash or arbitrary code execution.
Patched version: 12.2.0
Pillow 12.1.1 addressed CVE-2026-25990 by adding checks for tile extents in PSD image decoding/encoding to prevent an out-of-bounds write. However, the bounds checks computed tile extent sums using types susceptible to integer overflow, meaning a PSD image with carefully chosen tile dimensions could produce values that wrap around and bypass the checks, still triggering an out-of-bounds write in src/decode.c and src/encode.c. The fix avoids adding extents together before comparison.
Use any version but affected versions: >= 10.3.0, < 12.2.0
| Vendor | Product |
|---|---|
| Python | Pillow |
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