CVE-2026-54739

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.
• 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

0.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 35.8% of scored records. A rank, not a probability.

NVD base score

6.9 (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:L/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

Received. NVD last modified this record on 2026-08-21.

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 20:16Z16 DAYS AGO

Last updated

2026-08-21 21:48Z14 DAYS AGO

Reserved

2026-06-15

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

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

Weaknesses

• CWE-204Observable Response DiscrepancyBase

Data version

5.2

Document digest

3e6fe43523203227b764443e6e273c991c2245667f0eeb965b12428594873da4

• github.comhttps://github.com/LemmyNet/lemmy/security/advisories/GHSA-xgg7-8hvq-8m65x_refsource_CONFIRM
• github.comhttps://github.com/LemmyNet/lemmy/pull/6531x_refsource_MISC
• github.comhttps://github.com/LemmyNet/lemmy/pull/6535x_refsource_MISC
• github.comhttps://github.com/LemmyNet/lemmy/commit/4d235a1b668b7dda6b73dbbc9ca289bb40acfa83x_refsource_MISC
• github.comhttps://github.com/LemmyNet/lemmy/commit/59e968a5ac36d36d08a59028e2dbb92641536964x_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-beta.1x_refsource_MISC
• join-lemmy.orghttps://join-lemmy.org/news/2026-06-09_-_Lemmy_Release_v0.19.19x_refsource_MISC