CVE-2026-63173
Omnispace Agora Project 26.10.0 Broken Access Control via isAutor()
Omnispace Agora Project through 26.10.0 contains a broken access control vulnerability in which the isAutor() function in MdlObject.php grants accessRight=3 based solely on object authorship without verifying the user still belongs to the object's space. Attackers who were previously members and authored objects can retain unauthorized read access to space objects even after being removed from the space, leading to persistent information disclosure.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Agora Project Omnispace xech/agora-project
github |
≥ 0; ≤ 26.10.0 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.3 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 5.4 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://www.akailabs.fr/blog/multiple-vulnerabilities-in-agora-project-26-5-2#cve-2026-63173-stale-author-access-after-space-revocation-via-isautorCNA: VulnCheck · technical-description
- https://www.agora-project.net/CNA: VulnCheck · product
- https://www.vulncheck.com/advisories/omnispace-agora-project-broken-access-control-via-isautorCNA: VulnCheck · third-party-advisory
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