CVE-2026-121413
Parse Server before 8.6.112 and 9.0.0 before 9.10.6-alpha.4 Session Permission Bypass via upgradeToRevocableSession
Parse Server before 8.6.112 and 9.0.0 before 9.10.6-alpha.4 contains an authorization bypass in the session upgrade endpoint, which creates a new session for any valid session token without enforcing the _Session class create class-level permission. Attackers holding a user's session token can send an already revocable token to /upgradeToRevocableSession to obtain additional sessions with fresh expiration that persist after the original session is logged out.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| parse-server parse-community parse-server
npm |
≥ 9.0.0; < 9.10.6-alpha.4 (affected, semver) 9.10.6-alpha.4 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
| parse-server parse-community parse-server
npm |
≥ 0; < 8.6.112 (affected, semver) 8.6.112 (unaffected, 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 / 2.3 low |
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 3.1 low |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-2j2x-c587-q33gCNA: VulnCheck · vendor-advisory
- https://github.com/parse-community/parse-server/pull/10808CNA: VulnCheck · patch, issue-tracking
- https://github.com/parse-community/parse-server/pull/10809CNA: VulnCheck · patch, issue-tracking
- https://www.vulncheck.com/advisories/parse-server-before-8.6.112-and-9.0.0-before-9.10.6-alpha.4-session-permission-bypass-via-upgradetorevocablesessionCNA: VulnCheck · third-party-advisory
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