CVE-2026-63635

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.19% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 8.8% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-09-29.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-18 15:39Z1 MO AGO

Last updated

2026-09-24 20:56Z1 MO AGO

Reserved

2026-07-17

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

• CWE-125Out-of-bounds ReadBase
• CWE-129Improper Validation of Array IndexVariant

Data version

5.2

Document digest

52dacd6c1ee71f6fd83d310b1720e4516f12a47190518dce306f032a0327d4a4

• github.comhttps://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-3c8w-9xvm-r6gfx_refsource_CONFIRM
• github.comhttps://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5282x_refsource_MISC
• github.comhttps://github.com/AcademySoftwareFoundation/OpenImageIO/commit/50481b0f90932a4675f65f3cc26407139cb9e20ex_refsource_MISC
• github.comhttps://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0x_refsource_MISC
• github.comhttps://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0x_refsource_MISC
• github.comhttps://github.com/user-attachments/files/29539076/poc.zipexploit