---
id: CVE-2026-121413
title: >-
  Parse Server before 8.6.112 and 9.0.0 before 9.10.6-alpha.4 Session Permission
  Bypass via upgradeToRevocableSession
summary: >-
  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…
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-863
vendor: parse-community
product: parse-server
affected:
  - parse-server >= 9.0.0 < 9.10.6-alpha.4
  - parse-server < 8.6.112
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-03T17:11:08.314489Z'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T17:11:44.523Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121413'
references:
  - url: >-
      https://github.com/parse-community/parse-server/security/advisories/GHSA-2j2x-c587-q33g
    label: GitHub Security Advisory (GHSA-2j2x-c587-q33g)
  - url: 'https://github.com/parse-community/parse-server/pull/10808'
  - url: 'https://github.com/parse-community/parse-server/pull/10809'
  - url: >-
      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
    label: >-
      VulnCheck Advisory: Parse Server before 8.6.112 and 9.0.0 before
      9.10.6-alpha.4 Session Permission Bypass via upgradeToRevocableSession
tags:
  - cve.org
epss: 0.00312
epssPercentile: 0.24251
ingestedAt: '2026-11-05T20:33:06.306Z'
---

## Overview

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

- `parse-server >= 9.0.0 < 9.10.6-alpha.4`
- `parse-server < 8.6.112`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.