CVE-2026-126395

MEDIUM 5.3

vLLM 0.14.0rc1 before 0.31.0 Heap Address Disclosure via sanitize_message()

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

vLLM from 0.14.0rc1 before 0.31.0 contains an information disclosure vulnerability in sanitize_message() whose lowercase-only regex fails to scrub uppercase PIL image addresses. Unauthenticated attackers can send a crafted PNG to endpoints such as /tokenize, triggering HF-processor errors that leak live server heap addresses useful for ASLR bypass.

CWE	CWE-532
Vendor	vllm-project
Product	vllm
Published	Nov 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

vllm-project / vllm

0.14.0rc1 < 0.31.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/vllm-project/vllm/security/advisories/GHSA-m9fg-w9qh-67pc vulncheck.com: https://www.vulncheck.com/advisories/vllm-0.14-0rc1-before-0.31.0-heap-address-disclosure-via-sanitize-message

Credits

🔍 0xiviel jperezdealgaba DarkLight1337