CVE-2026-54742

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

0.54% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 45.6% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/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

Deferred. NVD last modified this record on 2026-09-09.

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

2026-08-19 20:10Z2 MO AGO

Last updated

2026-08-20 20:01Z2 MO AGO

Reserved

2026-06-15

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 5.1)

CNA CVSS vector

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

Weaknesses

• CWE-863Incorrect AuthorizationClass

Data version

5.2

Document digest

0f07cbc8bf1113ea01cec36e7b034ef6c8cfc654b5a9b2c43174cb252715923e

• github.comhttps://github.com/LemmyNet/lemmy/security/advisories/GHSA-gwfj-h8r7-792vx_refsource_CONFIRM
• github.comhttps://github.com/LemmyNet/lemmy/pull/6500x_refsource_MISC
• github.comhttps://github.com/LemmyNet/lemmy/pull/6501x_refsource_MISC
• github.comhttps://github.com/LemmyNet/lemmy/commit/108d78c592cc88bac2b0bf52ca6631be54f6fb23x_refsource_MISC
• github.comhttps://github.com/LemmyNet/lemmy/commit/abe256243822526dcd4bca857f7c0adeb49944f5x_refsource_MISC
• github.comhttps://github.com/LemmyNet/lemmy/releases/tag/0.19.19x_refsource_MISC
• github.comhttps://github.com/LemmyNet/lemmy/releases/tag/1.0.0-alpha.20x_refsource_MISC
• join-lemmy.orghttps://join-lemmy.org/news/2026-06-09_-_Lemmy_Release_v0.19.19x_refsource_MISC