GHSA-hgg8-fqqc-vfmw: vLLM: incomplete CVE-2026-22778 fix leaks PIL repr addresses via Anthropic router
- Identifiers
- CVE-2026-54236GHSA-hgg8-fqqc-vfmw
- Published
- Record updated
- Affected
- vllm <= 0.23.0
- Fixed in
- No fixed version was stated when the source was last read.
- Known exploitation
- Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
- EPSS
- 0.9%
Summary
The fix for CVE-2026-22778 / GHSA-4r2x-xpjr-7cvv (PRs #31987 and #32319) added `sanitize_message` at four OpenAI router exception sites, but later vLLM response paths still return `str(exc)` unsanitized. Malformed image bytes make PIL raise `UnidentifiedImageError` with a BytesIO object repr containing a heap address, which these paths echo to clients in `main` HEAD (`771e1e48b`, 2026-05-26). The paths listed are `vllm/entrypoints/anthropic/api_router.py` (lines 78 and 124), `vllm/entrypoints/anthropic/serving.py` (line 808), and `vllm/entrypoints/speech_to_text/realtime/connection.py` (lines 75 and 265).
Mitigation
The source does not state a fix yet. Check the original advisory for updates.
Affected packages in the Exposure Registry
Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.
- vllmPyPILLM dependency since 2023-08-25 · 15 tracked dependents
Topics
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