CVE-2026-54741Disclosure

LOWCVSS 5.3 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Lemmy is a link aggregator and forum for the fediverse. Prior to 0.19.19 and 1.0.0-alpha.18, Lemmy blocks new private messages from a sender after the recipient blocks that sender, but the edit path skips the same block check. create_private_message checks the recipient's block list with PersonActions::read_block before inserting a message, while edit_private_message in crates/api/api_crud/src/private_message/update.rs only checks that the caller is orig_private_message.creator_id. The update then writes new content and returns the modified PrivateMessageView without consulting the recipient's block list, allowing a blocked sender to keep changing an old message that the recipient can still see and providing a post-block harassment path. This issue is fixed in versions 0.19.19 and 1.0.0-alpha.18.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-862

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

2 mentions across 1 observed day

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Infoflowcloud@infoflowcloud46d
Disclosure
🚨*CVE* CVE-2026-54741 Lemmy is a link aggregator and forum for the fediverse. Prior to 0.19.19 and 1.0.0-alpha.18, Lemmy blocks new private messages from a sender after the recipient block… https://www.cve.org/CVERecord?id=CVE-2026-54741 ----- Traducción: CVE-2026-54741 Lem… https://infoflow.cloud`
Post summary
The post announces CVE‑2026‑54741, describing how Lemmy incorrectly blocks private messages after a user block in versions prior to 0.19.19 and 1.0.0‑alpha.18, and provides a link to the CVE record, but does not reference a PoC, exploit, active use, patch, or false positive notice.
0000028
100 followersView on X
CVE@CVEnew46d
Disclosure
CVE-2026-54741 Lemmy is a link aggregator and forum for the fediverse. Prior to 0.19.19 and 1.0.0-alpha.18, Lemmy blocks new private messages from a sender after the recipient block… https://www.cve.org/CVERecord?id=CVE-2026-54741
Post summary
The tweet announces a CVE affecting Lemmy’s messaging behavior, providing a brief technical detail without any evidence of exploitation or available PoC.
00000867
58.0K followersView on X

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