CVE-2024-4540

highpriority · track · 0OT risk · elevatedEPSS 0.006 · 45 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.55% (45th) EPSS

CVSS 7.5 · high

Is it mine?

18 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-21

A flaw was found in Keycloak in OAuth 2.0 Pushed Authorization Requests (PAR). Client-provided parameters were found to be included in plain text in the KC_RESTART cookie returned by the authorization server's HTTP response to a `request_uri` authorization request, possibly leading to an information disclosure vulnerability.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · secalert@redhat.com USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200USCWE-200USCWE-312USCWE-315USCWE-922US

affected products (18)

Products and version ranges known to be affected.

Red Hat RHEL-8 based Middleware Containers< 7.6-49enisa_euvdEU
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7< 0:18.0.14-1.redhat_00001.1.el7ssoenisa_euvdEU
Red Hat Red Hat Single Sign-On 7.6 for RHEL 8< 0:18.0.14-1.redhat_00001.1.el8ssoenisa_euvdEU
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9< 0:18.0.14-1.redhat_00001.1.el9ssoenisa_euvdEU
Red Hat Red Hat build of Keycloak 22< 22-15enisa_euvdEU
Red Hat Red Hat build of Keycloak 22< 22-18enisa_euvdEU
Red Hat Red Hat build of Keycloak 22< 22.0.11-2enisa_euvdEU
Red Hat Red Hat build of Keycloak 24< 24-10enisa_euvdEU
Red Hat Red Hat build of Keycloak 24< 24.0.5-2enisa_euvdEU
Red Hat Inc. Red Hat Build of Keycloak≤ 24fstec_bduRU
Red Hat Inc. Red Hat Build of Keycloak≤ 22fstec_bduRU
Red Hat Inc. Red Hat Build of Keycloakall versionsfstec_bduRU
Red Hat Inc. Red Hat Enterprise Linux≤ 8 based Middleware Containersfstec_bduRU
Red Hat Inc. Red Hat Single Sign-On≤ 7.6 for RHEL 9fstec_bduRU
Red Hat Inc. Red Hat Single Sign-On≤ 7.6 for RHEL 8fstec_bduRU
Red Hat Inc. Red Hat Single Sign-On≤ 7.6 for RHEL 7fstec_bduRU
Red Hat Inc. Red Hat Single Sign-On≤ 7fstec_bduRU
Maven org.keycloak:keycloak-services< 24.0.5osvUSpkg:maven/org.keycloak/keycloak-services

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-1279Red Hat Single Sign On und Keycloak: Schwachstelle ermöglicht Offenlegung von InformationenDeutsch2024-06-03csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Single Sign On und Keycloak ausnutzen, um Informationen offenzulegen.
GHSA-69fp-7c8p-crjrKeycloak exposes sensitive information in Pushed Authorization Requests (PAR)2024-06-10ghsa · osvUS
A flaw was found in Keycloak in the OAuth 2.0 Pushed Authorization Requests (PAR). Client provided parameters were found to be included in plain text in the KC_RESTART cookie returned by the authorization server's HTTP response to a request_uri authorization request. This could lead to an information disclosure vulnerability.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund NVD CVE.org MITRE

published 2024-06-03modified 2026-10-09

references (36)

External citations — patches, advisories, analysis.

scry

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