CVE-2026-63151

CVSS 8.7 (high) · published 2026-11-13

Omnispace Agora Project through 26.10.0 contains a predictable token generation vulnerability that allows unauthenticated attackers to access private calendar data by exploiting a missing dateCrea value that causes the md5Id token to collapse to md5(calendarId.userId), both small enumerable integers. Attackers can compute valid tokens and request the misc&action=DisplayIcal endpoint with a forged md5Id to read any user's private calendar events without authentication.

Weakness: CWE-330

Source: NVD CVE-2026-63151

References

• https://www.agora-project.net/
• https://www.akailabs.fr/blog/multiple-vulnerabilities-in-agora-project-26-5-2#cve-2026-63151-personal-calendars-zero-entropy-md5id-share-token-allows-unauthen
• https://www.vulncheck.com/advisories/omnispace-agora-project-predictable-token-information-disclosure-via-displayical

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