CVE-2026-54236: vLLM Incomplete Fix Leaks PIL Repr Addresses

# CVE-2026-54236: vLLM Incomplete Fix Leaks PIL Repr Addresses

https://gcdradar.vercel.app/incidents/cve-2026-54236-vllm-incomplete-fix-leaks-pil-repr-addresses · AIR-2026-0770 · closed 2026-06-17

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-06-17
- AI role: Attack on AI
- Products: vLLM
- CVE ids: CVE-2026-54236
- CVSS: 5.3

## Summary

An incomplete fix for a prior vulnerability in vLLM leads to information disclosure of memory addresses via the Anthropic API router. The flaw has been documented with a vendor advisory and patch.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-06-22: CVE-2026-54236: vLLM is an inference and serving engine for large language models (LLMs). (https://nvd.nist.gov/vuln/detail/CVE-2026-54236)
- 2026-06-17: CVE-2026-54236: vLLM: incomplete CVE-2026-22778 fix leaks PIL repr addresses via Anthropic router (https://github.com/advisories/GHSA-hgg8-fqqc-vfmw)

## Sources

- 2026-06-17 GitHub Advisory Database: CVE-2026-54236: vLLM: incomplete CVE-2026-22778 fix leaks PIL repr addresses via Anthropic router https://github.com/advisories/GHSA-hgg8-fqqc-vfmw
- 2026-06-22 NVD: CVE-2026-54236: vLLM is an inference and serving engine for large language models (LLMs). https://nvd.nist.gov/vuln/detail/CVE-2026-54236

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.