CVE-2026-30949Network attack vector

Account takeover via unchecked Keycloak token audience

Published Mar 10, 2026 · Updated Mar 10, 2026

Improper authentication in Parse Server before 8.6.18 and 9.0.0 through 9.5.2-alpha.4 allows remote authenticated users to take over accounts. The Keycloak adapter accepts an access token without matching its azp claim to the configured client-id, so a token for another client authenticates as any Parse user. Exploitation requires the Keycloak adapter, multiple clients in one realm, and a valid token from that realm; it grants cross-application account access.

CVSS severity7.6
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Parse Server before 8.6.18 and 9.0.0 through 9.5.2-alpha.4 allows remote authenticated users to take over accounts. The Keycloak adapter accepts an access token without matching its azp claim to the configured client-id, so a token for another client authenticates as any Parse user. Exploitation requires the Keycloak adapter, multiple clients in one realm, and a valid token from that realm; it grants cross-application account access.

The record

CVE
CVE-2026-30949
Published
Mar 10, 2026
Updated
Mar 10, 2026
Vendor
Parse Platform
Product
Parse Server
Classifications
CWE-287, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.6.18
  2. Affected versionversion=>= 9.0.0 < 9.5.2-alpha.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Parse Platform · Parse Serverversion=< 8.6.18; version=>= 9.0.0 < 9.5.2-alpha.5

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.6GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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