Infinite loop Affecting imagecodecs package, versions [2026.10.10,]
Threat Intelligence
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-IMAGECODECS-22149962
- published3 Nov 2026
- disclosed1 Nov 2026
- creditDilanka Kaushal Hewage (r3vpwnx)
Introduced: 1 Nov 2026
NewCVE-2026-120251 (opens in a new tab)How to fix?
There is no fixed version for imagecodecs.
Overview
imagecodecs is an Imagecodecs is a Python library that provides block-oriented, in-memory buffer transformation, compression, and decompression functions for use in Tifffile, Czifile, Zarr, kerchunk, and other scientific image input/output packages.
Affected versions of this package are vulnerable to Infinite loop via ccitt_fax4_decode_size(), which is called by ccittfax4_decode() and the numcodecs Ccittfax4 codec. An attacker can supply an 8-byte CCITT Group 4 stream lacking an EOFB (end-of-facsimile-block) marker, causing the function to loop indefinitely and consume full CPU until the process is killed.