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  4. CVE 2026 112390 pillow infinite loop in mic nframes when the
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Back to active CVEs
High · CVSS 8.2CVE-2026-112390

Pillow: Infinite loop in MIC n_frames when the embedded TIFFCVE-2026-112390

Answer in brief

CVE-2026-112390 records a High severity (CVSS 8.2) vulnerability in Pillow: Infinite loop in MIC n_frames when the embedded TIFF. The current sources do not mark it as known exploited. The current feed maps python-pillow/Pillow (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 19, 2026Updated Oct 19, 2026Source checked Oct 19, 2026First seen by HOL Oct 19, 2026Material review Oct 19, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.2
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps python-pillow/Pillow (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
python-pillow/Pillowgeneric>=7.2.0 <13.0.013.0.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for python-pillow/Pillow.
  2. 2Review the reported fix. Update python-pillow/Pillow to 13.0.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 19, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

Pillow is a Python imaging library. From 7.2.0 until 13.0.0, Pillow can enter an infinite loop while determining the frame count of a MIC image. MicImageFile inherits TIFF frame traversal, but MicImageFile.tell reports the OLE stream index and its seek() resets TIFF frame state, so an embedded TIFF with at least three IFDs never advances. When an application with olefile installed reads n_frames or saves all frames from a crafted MIC file, the non-advancing traversal can hold a worker at full CPU indefinitely. This issue is fixed in version 13.0.0.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Pillow: PdfParser can recurse without limit in get_value() and linearize_page_tree()Same python-pillow/pillow package
  • Pillow: NULL dereference in ImagingExpand via rank filters on zero-size imagesSame python-pillow/pillow package
  • Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIOSame python-pillow/pillow package
  • Pillow: P;2L and P;4L decoders may read 1 to 3 bytes past the passed buffer sizeSame python-pillow/pillow package
  • Pillow tiled-TIFF decoder reads past tile buffer in copy4 (Unpack.c:1290)Same python-pillow/pillow package
  • Pillow: Heap use-after-free when encoding TIFF to an in-memory bufferSame python-pillow/pillow package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-835
Source
CVE List V5
Source checked
Oct 19, 2026
References
3 linked sources
Open source record