vLLM Regular Expression Denial of Service
vLLM
Multiple regular expressions in the vLLM codebase are susceptible to Regular Expression Denial of Service attacks. Crafted input can trigger catastrophic backtracking and severe performance degradation.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- fix status
- Fix status unknown
- first report
- 28 May 2025
- last update
- 28 May 2025
Timeline · 1
Sources · 1
Advisories and databases
- 2025-05-28GHSA-j828-28rj-hfhp: vLLM vulnerable to Regular Expression Denial of ServiceGitHub Advisory Database · github.com/advisories/GHSA-j828-28rj-hfhp
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerability
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling
- owasp llm top 10
- LLM03:2025 Supply Chain
- mitre atlas
- no technique for these categories
- dates
- happened 28 May 2025 · first reported 28 May 2025
- origin
- GitHub Advisory DatabaseVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-18 07:00Z · updated 2026-10-18 10:14Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
Copy a brief
This record as a short Markdown brief, for a ticket, a chat or a coding agent.
the brief as text
# vLLM Regular Expression Denial of Service https://gcdradar.vercel.app/incidents/ghsa-j828-28rj-hfhp-vllm-regular-expression-denial-of-servic · AIR-2025-0289 · closed 2025-05-28 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2025-05-28 - AI role: Attack on AI - Products: vLLM ## Summary Multiple regular expressions in the vLLM codebase are susceptible to Regular Expression Denial of Service attacks. Crafted input can trigger catastrophic backtracking and severe performance degradation. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2025-05-28: GHSA-j828-28rj-hfhp: vLLM vulnerable to Regular Expression Denial of Service (https://github.com/advisories/GHSA-j828-28rj-hfhp) ## Sources - 2025-05-28 GitHub Advisory Database: GHSA-j828-28rj-hfhp: vLLM vulnerable to Regular Expression Denial of Service https://github.com/advisories/GHSA-j828-28rj-hfhp Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
Related
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Patch now · Disclosed · since 28 May 2025 · updated 30 May 2025 · CVE-2025-48943
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Patch now · Disclosed · since 28 May 2025 · updated 30 May 2025 · CVE-2025-48887
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Patch now · Disclosed · since 28 May 2025 · updated 29 May 2025 · CVE-2025-46570
AI - closed6.5vLLM CVE-2025-48944: vLLM Tool Schema Allows DoS via Malformed Fields
Patch now · Disclosed · since 28 May 2025 · updated 30 May 2025 · CVE-2025-48944
AI