CVE-2026-34757

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 9.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2026-04-09 14:41Z6 MO AGO

Last updated

2026-05-09 10:21Z5 MO AGO

Reserved

2026-03-30

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 5.1)

CNA CVSS vector

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

Weaknesses

• CWE-416Use After FreeVariant
• CWE-825Expired Pointer DereferenceBase

Data version

5.2

Document digest

4c03c667b1fa2ac81e1185a22087c0992cc75b778042949274c965bb5aa605a1

• github.comhttps://github.com/pnggroup/libpng/security/advisories/GHSA-6fr7-g8h7-v645x_refsource_CONFIRM
• github.comhttps://github.com/pnggroup/libpng/issues/836x_refsource_MISC
• github.comhttps://github.com/pnggroup/libpng/issues/837x_refsource_MISC
• github.comhttps://github.com/pnggroup/libpng/commit/398cbe3df03f4e11bb031e07f416dfdde3684e8ax_refsource_MISC
• github.comhttps://github.com/pnggroup/libpng/commit/55d20aaa322c9274491cda82c5cd4f99b48c6bccx_refsource_MISC
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2026/05/msg00017.html