vulnerability · Wed 07 Oct 2026 · 16:18 UTC
GHSA-jj3q-cwqj-842r: ImageSharp: CCITT fax decompression (T4/Modified Huffman): unbounded WriteBits overflows strip buffer — heap
Filed UTCSource GTH ↗
When decoding a fax-compressed strip TIFF (Compression=3 / Group 3 1D, or Compression=2 / Modified Huffman), the CCITT decompressors write decoded runs through BitWriterUtils.WriteBits/WriteBit/WriteZeroBit, which advance and write bits via Unsafe.Add with read-modify-write semantics — without ever comparing the write position against the target buffer length. …
Signals
as the pipeline stamped them- High
- High-risk vulnerability — CVSS 7.5
CVE
KEV from CISA · EPSS from FIRST| Id | KEV | EPSS | Reference |
|---|---|---|---|
| CVE-2026-106117 | — | 0.43% | NVD ↗ |
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