CVE-2026-54740

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

0.42% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 36.7% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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 20:14Z2 MO AGO

Last updated

2026-08-20 19:57Z2 MO AGO

Reserved

2026-06-15

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

• CWE-862Missing AuthorizationClass

Data version

5.2

Document digest

b7ea1e7bed308f8710bdbe82eefc9fbb991901f20770a46958efc31ec2c6a31a

• github.comhttps://github.com/LemmyNet/lemmy/security/advisories/GHSA-xmpx-2j2f-c7g7x_refsource_CONFIRM
• github.comhttps://github.com/LemmyNet/lemmy/pull/6475x_refsource_MISC
• github.comhttps://github.com/LemmyNet/lemmy/pull/6478x_refsource_MISC
• github.comhttps://github.com/LemmyNet/lemmy/commit/d127e714a66f34f6b9c8ea15f20097ac907cdf28x_refsource_MISC
• github.comhttps://github.com/LemmyNet/lemmy/commit/ede1d348344ca2027fd1bc6a0cab25575c0c3a4cx_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.18x_refsource_MISC
• join-lemmy.orghttps://join-lemmy.org/news/2026-06-09_-_Lemmy_Release_v0.19.19x_refsource_MISC