CVE-2026-34543

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.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• 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

0.48% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 41.2% of scored records. A rank, not a probability.

NVD base score

8.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-10-26.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

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

2026-04-01 20:56Z7 MO AGO

Last updated

2026-04-02 13:59Z7 MO AGO

Reserved

2026-03-30

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-908Use of Uninitialized ResourceBase
• CWE-824Access of Uninitialized PointerBase

Data version

5.2

Document digest

ba34e75ceb55d591b18b7a202e1d96946f81858e84d63a45fb0a811fc3550ab3

• github.comhttps://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w-m432x_refsource_CONFIRM
• github.comhttps://github.com/AcademySoftwareFoundation/openexr/commit/5f6d0aaa9e43802917af7db90f181e88e083d3b8x_refsource_MISC
• github.comhttps://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.8x_refsource_MISC