CVE-2025-11537

mediumpriority · track · 0EPSS 0.002 · 5 %ileDEEUJPUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.16% (5th) EPSS

CVSS 5 · medium

Is it mine?

8 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · osv

EPSS · scored 2026-10-23

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern (such as the pre-defined 'long' pattern), sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract these credentials (e.g., bearer tokens, session cookies) and use them to impersonate users, leading to a full account compromise.

cvss

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

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.15mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:Nsecondary · secalert@redhat.com USexploitability 1.3 · impact 3.6

v3.15mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:Nsecondary · OSV

v3.14.6mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/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.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-117USCWE-117US

affected products (8)

Products and version ranges known to be affected.

Open Source Keycloak <26.5.3all versionscert_bundDE
Open Source Keycloak <26.5.6all versionscert_bundDE
Open Source Keycloak <26.6.0all versionscert_bundDE
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Open Source Keycloak< 26.5.3cert_bundDE
Open Source Keycloak< 26.5.6cert_bundDE
Open Source Keycloak< 26.6.0cert_bundDE
Maven org.keycloak:keycloak-quarkus-server< 26.5.6osvUSpkg:maven/org.keycloak/keycloak-quarkus-server

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0394Keycloak: Mehrere Schwachstellen ermöglichen Offenlegung von InformationenDeutsch2026-02-11csaf · cert_bundDE
Ein lokaler, oder entfernter authentisierter Angreifer kann mehrere Schwachstellen in Keycloak ausnutzen, um Informationen offenzulegen.
GHSA-gv3v-2cpp-3pmqKeycloak logs sensitive headers2026-02-10ghsa · osvUS
A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern (such as the pre-defined 'long' pattern), sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract these credentials (e.g., bearer tokens, session cookies) and use them to impersonate users, leading to a full account compromise. Patches are available, see: - https://github.com/keycloak/keycloak/releases/tag/26.4.11 - https://github.com/keycloak/keycloak/releases/tag/26.5.6 - https://github.com/keycloak/keycloak/releases/tag/26.6.0
JVNDB-2026-026852JVN iPedia advisory JVNDB-2026-0268522026-08-05vendor · jvndbJP

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund osv jvndb NVD CVE.org MITRE

published 2026-02-10modified 2026-06-17

references (6)

External citations — patches, advisories, analysis.

scry

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