Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck

CVE-2026-121413Parse Server before 8.6.112 and 9.0.0 before 9.10.6-alpha.4 Session Permission Bypass via upgradeToRevocableSession

Low 3.1

In plain English

A low-severity incorrect authorization in parse-server from parse-community. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 3.1)3.1Low

Exploit odds (30 days)0.3%top 75.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
parse-community	parse-server	9.0.0 – before 9.10.6-alpha.4
parse-community	parse-server	0 – before 8.6.112

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

References

GitHub Security Advisory (GHSA-2j2x-c587-q33g) vendor-advisory
https://github.com/parse-community/parse-server/pull/10808 patch, issue-tracking
https://github.com/parse-community/parse-server/pull/10809 patch, issue-tracking
VulnCheck Advisory: Parse Server before 8.6.112 and 9.0.0 before 9.10.6-alpha.4 Session Permission Bypass via upgradeToRevocableSession third-party-advisory