CVE-2026-0976

lowpriority · track · 0EPSS 0.005 · 42 %ileDEEUJPUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.49% (42nd) EPSS
CVSS 3.7 · low
Is it mine?
2 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · cert_bund · osv

EPSS · scored 2026-10-27

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments, potentially bypassing proxy-level path filtering. This could expose administrative or sensitive endpoints that operators believe are not externally reachable.

01

cvss

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

3.7
010

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

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · ENISA EU
v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · secalert@redhat.com USexploitability 2.2 · impact 1.4
v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · OSV
v3.13.4lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

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

Trackcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-20US
04

affected products (2)

Products and version ranges known to be affected.

05

advisories (3)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-0124Keycloak: Schwachstelle ermöglicht Offenlegung von InformationenDeutsch2026-01-14csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Keycloak ausnutzen, um Informationen offenzulegen.

  • GHSA-v897-pv23-r8cwKeycloak has an improper input validation vulnerability2026-01-15ghsa · osvUS

    A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments, potentially bypassing proxy-level path filtering. This could expose administrative or sensitive endpoints that operators believe are not externally reachable.

  • JVNDB-2026-026852JVN iPedia advisory JVNDB-2026-0268522026-08-05vendor · jvndbJP
06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcert_bundosvjvndbNVDCVE.orgMITRE
published 2026-01-15modified 2026-10-22
08

references (7)

External citations — patches, advisories, analysis.

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