CVE-2026-40930

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• 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

0.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 10.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-07-22.

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

2026-06-04 14:34Z4 MO AGO

Last updated

2026-06-04 16:37Z4 MO AGO

Reserved

2026-04-15

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 5.4)

CNA CVSS vector

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

Weaknesses

• CWE-436Interpretation ConflictClass
• CWE-1288Improper Validation of Consistency within InputBase

Data version

5.2

Document digest

9feeb2bf1cef225f33ec1a16820ea95dcd1b4b8b68631624a0a9fc4ee0ea02f1

• github.comhttps://github.com/pnggroup/libpng/security/advisories/GHSA-c4v6-gxrq-6g2xx_refsource_CONFIRM
• github.comhttps://github.com/pnggroup/libpng/commit/faf06924688b62d7c1654b5ceddedbde66ffadb4x_refsource_MISC
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/05/15/21