CVE-2026-12491

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreHIGH confidence

Score 4.8 from GitHub Security Advisory published 2026-06-17. a secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A flaw was found in vLLM, an open-source library for large language model inference. This vulnerability arises from improper handling of image metadata, specifically EXIF orientation and PNG transparency (tRNS) data, during image processing. When images are converted to RGB, transparency information may be implicitly discarded or remapped, leading to unexpected rendering of transparent pixels and distortion of input content. This can result in the model misinterpreting image content, potentially affecting the integrity of processed data.

CVSS v3
4.8
EG Score
4.8(high)
EG Risk
—
EPSS
15.1%
KEV
Not listed

Published

June 17, 2026

Last Modified

July 7, 2026

Advisory Details (2)

Auto-updated Jun 18, 2026
Patch available. Sources: redhat.
redhat

2489786 – (CVE-2026-12491) CVE-2026-12491 vllm: vllm: image EXIF Rotation & PNG tRNS Transparency Not Normalized, Causing Mismatch Between Model Input and Expectations

https://bugzilla.redhat.com/show_bug.cgi?id=2489786
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-12491

Vendor Advisories for CVE-2026-12491(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
pipvllm—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
vllm0.11.0 ... 0.23.0 (23 versions)——

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 59× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:30 UTCEPSS rescore
  5. 2026-07-19 02:28 UTCEPSS rescore
  6. 2026-07-18 10:04 UTCEPSS rescore
  7. 2026-07-16 17:02 UTCEPSS rescore
  8. 2026-07-16 12:55 UTCGHSA enrichment
  9. 2026-07-15 16:57 UTCEPSS rescore
  10. 2026-07-15 14:49 UTCGHSA enrichment
  11. 2026-07-15 02:00 UTCEPSS rescore
  12. 2026-07-14 13:40 UTCGHSA enrichment
  13. 2026-07-13 22:30 UTCEPSS rescore
  14. 2026-07-13 15:34 UTCGHSA enrichment
  15. 2026-07-13 06:12 UTCEPSS rescore
  16. 2026-07-12 17:23 UTCGHSA enrichment
  17. 2026-07-12 05:46 UTCEPSS rescore
  18. 2026-07-11 19:17 UTCGHSA enrichment
  19. 2026-07-11 08:27 UTCEPSS rescore
  20. 2026-07-10 21:11 UTCGHSA enrichment
  21. 2026-07-09 23:04 UTCGHSA enrichment
  22. 2026-07-09 19:10 UTCEPSS rescore
  23. 2026-07-09 00:58 UTCGHSA enrichment
  24. 2026-07-08 15:15 UTCEPSS rescore
  25. 2026-07-08 15:15 UTCEPSS rescore
Show 49 more
  1. 2026-07-08 02:52 UTCGHSA enrichment
  2. 2026-07-07 13:46 UTCEPSS rescore
  3. 2026-07-07 04:44 UTCGHSA enrichment
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 06:34 UTCGHSA enrichment
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 07:51 UTCGHSA enrichment
  8. 2026-07-05 02:30 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 08:00 UTCGHSA enrichment
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-03 09:16 UTCGHSA enrichment
  13. 2026-07-02 11:11 UTCGHSA enrichment
  14. 2026-07-01 15:06 UTCEPSS rescore
  15. 2026-07-01 15:06 UTCEPSS rescore
  16. 2026-07-01 12:28 UTCGHSA enrichment
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-30 14:22 UTCGHSA enrichment
  19. 2026-06-29 16:06 UTCGHSA enrichment
  20. 2026-06-29 14:06 UTCEPSS rescore
  21. 2026-06-28 18:00 UTCGHSA enrichment
  22. 2026-06-28 14:07 UTCEPSS rescore
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-27 19:54 UTCGHSA enrichment
  26. 2026-06-27 03:08 UTCEPSS rescore
  27. 2026-06-26 21:48 UTCGHSA enrichment
  28. 2026-06-25 23:33 UTCGHSA enrichment
  29. 2026-06-25 13:49 UTCEPSS rescore
  30. 2026-06-25 01:27 UTCGHSA enrichment
  31. 2026-06-24 14:05 UTCEPSS rescore
  32. 2026-06-24 03:21 UTCGHSA enrichment
  33. 2026-06-23 21:32 UTCEPSS rescore
  34. 2026-06-23 05:13 UTCGHSA enrichment
  35. 2026-06-22 14:25 UTCEPSS rescore
  36. 2026-06-22 14:25 UTCEPSS rescore
  37. 2026-06-22 07:07 UTCGHSA enrichment
  38. 2026-06-21 14:56 UTCEPSS rescore
  39. 2026-06-21 14:56 UTCEPSS rescore
  40. 2026-06-21 09:01 UTCGHSA enrichment
  41. 2026-06-21 01:59 UTCEPSS rescore
  42. 2026-06-21 01:59 UTCEPSS rescore
  43. 2026-06-20 10:41 UTCGHSA enrichment
  44. 2026-06-19 19:25 UTCEPSS rescore
  45. 2026-06-19 12:33 UTCGHSA enrichment
  46. 2026-06-18 17:52 UTCEPSS rescore
  47. 2026-06-18 14:24 UTCGHSA enrichment
  48. 2026-06-17 16:17 UTCEG score recompute
  49. 2026-06-17 15:51 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-12491?
CVE-2026-12491 is a medium vulnerability published on June 17, 2026. A flaw was found in vLLM, an open-source library for large language model inference. This vulnerability arises from improper handling of image metadata, specifically EXIF orientation and PNG transparency (tRNS) data, during image processing. When images are converted to RGB, transparency…
When was CVE-2026-12491 disclosed?
CVE-2026-12491 was first published in the National Vulnerability Database on June 17, 2026, with the most recent update on July 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12491 actively exploited?
CVE-2026-12491 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12491?
CVE-2026-12491 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-12491?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12491, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-12491

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