HOMEVULNERABILITIESCVE-2026-34532
CRITICAL

CVE-2026-34532

CWE-863Published: March 31, 2026· Updated: Apr 2, 2026

9.1
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:13.6th

Official Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.67 and 9.7.0-alpha.11, an attacker can bypass Cloud Function validator access controls by appending "prototype.constructor" to the function name in the URL. When a Cloud Function handler is declared using the function keyword and its validator is a plain object or arrow function, the trigger store traversal resolves the handler through its own prototype chain while the validator store fails to mirror this traversal, causing all access control enforcement to be skipped. This allows unauthenticated callers to invoke Cloud Functions that are meant to be protected by validators such as requireUser, requireMaster, or custom validation logic. This issue has been patched in versions 8.6.67 and 9.7.0-alpha.11.

NVD Source

Technical Analysis

CVE-2026-34532 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.

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/4fc48cf28f22eea200d74d883505f485234a48d7
PATCHhttps://github.com/parse-community/parse-server/commit/dc59e272665644083c5b7f6862d88ce1ef0b2674
PATCHhttps://github.com/parse-community/parse-server/pull/10342
PATCHhttps://github.com/parse-community/parse-server/pull/10343
PATCHhttps://github.com/parse-community/parse-server/security/advisories/GHSA-vpj2-qq7w-5qq6

All References (5)

→
https://github.com/parse-community/parse-server/commit/4fc48cf28f22eea200d74d883505f485234a48d7Patch
→
https://github.com/parse-community/parse-server/commit/dc59e272665644083c5b7f6862d88ce1ef0b2674Patch
→
https://github.com/parse-community/parse-server/pull/10342Issue Tracking · Patch
→
https://github.com/parse-community/parse-server/pull/10343Issue Tracking · Patch
→
https://github.com/parse-community/parse-server/security/advisories/GHSA-vpj2-qq7w-5qq6Patch · Vendor Advisory · Mitigation

Quick Facts

CVE IDCVE-2026-34532
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-863
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedMar 31, 2026

Related CVEs (CWE-863)

CVE-2026-48286
10.0
CVE-2026-48303
10.0
CVE-2026-44330
10.0
CVE-2026-41283
9.9
CVE-2026-43948
9.9
CVE-2026-28466
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-34532 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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