HOMEVULNERABILITIESCVE-2026-34373
HIGH

CVE-2026-34373

CWE-346Published: March 31, 2026· Updated: Apr 2, 2026

8.8
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:5.4th

Official Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.66 and 9.7.0-alpha.10, the GraphQL API endpoint does not respect the allowOrigin server option and unconditionally allows cross-origin requests from any website. This bypasses origin restrictions that operators configure to control which websites can interact with the Parse Server API. The REST API correctly enforces the configured allowOrigin restriction. This issue has been patched in versions 8.6.66 and 9.7.0-alpha.10.

NVD Source

Technical Analysis

CVE-2026-34373 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

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

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/0347641507891d0013ec57f7c10f012064f41263
PATCHhttps://github.com/parse-community/parse-server/commit/4dd0d3d8be1c39664c74ad10bb0abaa76bc41203
PATCHhttps://github.com/parse-community/parse-server/pull/10334
PATCHhttps://github.com/parse-community/parse-server/pull/10335
PATCHhttps://github.com/parse-community/parse-server/security/advisories/GHSA-q3p6-g7c4-829c

All References (5)

→
https://github.com/parse-community/parse-server/commit/0347641507891d0013ec57f7c10f012064f41263Patch
→
https://github.com/parse-community/parse-server/commit/4dd0d3d8be1c39664c74ad10bb0abaa76bc41203Patch
→
https://github.com/parse-community/parse-server/pull/10334Issue Tracking · Patch
→
https://github.com/parse-community/parse-server/pull/10335Issue Tracking · Patch
→
https://github.com/parse-community/parse-server/security/advisories/GHSA-q3p6-g7c4-829cPatch · Vendor Advisory

Quick Facts

CVE IDCVE-2026-34373
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-346
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedMar 31, 2026

Related CVEs (CWE-346)

CVE-2026-42901
10.0
CVE-2026-6508
9.8
CVE-2026-44985
9.6
CVE-2026-2611
9.6
CVE-2026-11624
9.4
CVE-2026-54069
9.2

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-34373 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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