HOMEVULNERABILITIESCVE-2026-33409
CRITICAL

CVE-2026-33409

CWE-287Published: March 24, 2026· Updated: Mar 25, 2026

9.1
CVSS v3.1
EPSS:0.07%probability of exploitation in 30 daysPercentile:21.0th

Official Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.52 and 9.6.0-alpha.41, an authentication bypass vulnerability allows an attacker to log in as any user who has linked a third-party authentication provider, without knowing the user's credentials. The attacker only needs to know the user's provider ID to gain full access to their account, including a valid session token. This affects Parse Server deployments where the server option allowExpiredAuthDataToken is set to true. The default value is false. This issue has been patched in versions 8.6.52 and 9.6.0-alpha.41.

NVD Source

Technical Analysis

CVE-2026-33409 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.1.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected Vendors & Products

parseplatform1 product
parse-server
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/parse-community/parse-server/commit/8d7df5639c4a35768fe8b78b4580b30e8a74721c
PATCHhttps://github.com/parse-community/parse-server/commit/98f4ba5bcf2c199bfe6225f672e8edcd08ba732d
ADVISORYhttps://github.com/parse-community/parse-server/security/advisories/GHSA-pfj7-wv7c-22pr

All References (5)

→
https://github.com/parse-community/parse-server/commit/8d7df5639c4a35768fe8b78b4580b30e8a74721cPatch
→
https://github.com/parse-community/parse-server/commit/98f4ba5bcf2c199bfe6225f672e8edcd08ba732dPatch
→
https://github.com/parse-community/parse-server/pull/10246Issue Tracking
→
https://github.com/parse-community/parse-server/pull/10247Issue Tracking
→
https://github.com/parse-community/parse-server/security/advisories/GHSA-pfj7-wv7c-22prVendor Advisory

Quick Facts

CVE IDCVE-2026-33409
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-287
CISA KEVNo
EPSS (30d)0.07%
Affected1 vendor
PublishedMar 24, 2026

Related CVEs (CWE-287)

CVE-2026-46389
10.0
CVE-2026-49197
10.0
CVE-2026-42822
10.0
CVE-2026-23600
10.0
CVE-2026-30836
10.0
CVE-2026-20182
KEV10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-33409 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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