Advisory details:
pypa / vllm/PYSEC-2026-2302
| Advisory ID | pypa/vllm/PYSEC-2026-2302 |
| Aliases |
CVE-2026-5497
GHSA-wcwg-c5fc-9vrc PYSEC-2026-2302 |
| Summary | vLLM versions 0.8.0 and later are vulnerable to an Out-of-Memory (OOM) Denial of Service (DoS) attack due to unbounded frame count processing in the `VideoMediaIO.load_base64()` method. When processing `video/jpeg` data URLs, the method splits the base64 data string on commas to extract individual JPEG frames without enforcing a frame count limit. An attacker can exploit this by crafting a single API request containing thousands of comma-separated base64-encoded JPEG frames in a data URL, causing the server to decode all frames into memory and crash due to excessive memory consumption. This vulnerability is reachable via the OpenAI-compatible chat completions API and does not require authentication. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 6.8 |
| Risk | 3.4 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| There are no known CWE. |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 7.5 | https://github.com/pypa/advisory-database/blob/main/vulns/vllm/PYSEC-2026-2302.yaml |
| Reference id | Reference type | URL |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-5497 | ||
| https://bugzilla.redhat.com/show_bug.cgi?id=2487813 | ||
| https://github.com/vllm-project/vllm/commit/58ee61422169ce17e08248f8efa1e9df434fe395 | ||
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5497.json | ||
| 7bd92629-b396-4449-8f88-6c0092530eb4 | Other | https://huntr.com/bounties/7bd92629-b396-4449-8f88-6c0092530eb4 |
| GHSA-wcwg-c5fc-9vrc | https://github.com/advisories/GHSA-wcwg-c5fc-9vrc |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-06-11T14:01:03Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/5xxx/CVE-2026-5497.json
Source Advisory: vulnrichment/CVE-2026-5497
[{'Exploitation': 'poc'},
{'Automatable': 'yes'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]