CVE-2026-121413

LOW 3.1

Parse Server before 8.6.112 and 9.0.0 before 9.10.6-alpha.4 Session Permission Bypass via upgradeToRevocableSession

CVSS Score

3.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-863
Vendor	parse-community
Product	parse-server
Published	Nov 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

parse-community / parse-server

9.0.0 < 9.10.6-alpha.4

parse-community / parse-server

0 < 8.6.112

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/parse-community/parse-server/security/advisories/GHSA-2j2x-c587-q33g github.com: https://github.com/parse-community/parse-server/pull/10808 github.com: https://github.com/parse-community/parse-server/pull/10809 vulncheck.com: 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-upgradetorevocablesession

Credits

mtrezza