Relay adds real-time collaboration to Obsidian. Relay Server versions 0.9.0 through 0.9.6 contain an authentication bypass in the multi-document WebSocket endpoints. When authentication is configured, WebSocket connections without a token query parameter were incorrectly treated as having full server permissions. An unauthenticated network attacker who knows or guesses a document ID could connect to the document sync WebSocket and read or modify document contents without a valid document token. This vulnerability is fixed in 0.9.7.
Metrics
Affected Vendors & Products
References
History
Wed, 13 May 2026 14:15:00 +0000
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ssvc
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Wed, 13 May 2026 11:00:00 +0000
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No-instructions
No-instructions relay-server |
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Tue, 12 May 2026 20:15:00 +0000
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| Description | Relay adds real-time collaboration to Obsidian. Relay Server versions 0.9.0 through 0.9.6 contain an authentication bypass in the multi-document WebSocket endpoints. When authentication is configured, WebSocket connections without a token query parameter were incorrectly treated as having full server permissions. An unauthenticated network attacker who knows or guesses a document ID could connect to the document sync WebSocket and read or modify document contents without a valid document token. This vulnerability is fixed in 0.9.7. | |
| Title | Relay Server WebSocket authentication bypass when token is omitted | |
| Weaknesses | CWE-639 CWE-863 |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-05-12T19:30:05.552Z
Updated: 2026-05-13T12:32:58.746Z
Reserved: 2026-04-30T18:49:06.712Z
Link: CVE-2026-42889
Updated: 2026-05-13T12:32:04.312Z
Status : Received
Published: 2026-05-12T20:16:42.143
Modified: 2026-05-12T20:16:42.143
Link: CVE-2026-42889
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