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Response snapshot Oct 27, 2026, 01:39 UTC

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VulnerabilityCVE-2026-2092

Keycloak: Unauthorized access via improper validation of encrypted SAML assertions

Keycloak's SAML broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed.

At a glance

Exploited
Not known
Severity
7.7 High (CVSS 3.1)
Chance of exploitation
0.4% in the next 30 days
Sources
1 source

What to do

GitHub lists first patched versions: org.keycloak:keycloak-services: 26.5.5. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-794g-x443-36f7 (opens a new tab)

What happened

Keycloak's SAML broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response, injecting an encrypted assertion for an arbitrary principal, leading to unauthorized access and potential information disclosure.

Affected package ranges reported by GitHub: org.keycloak:keycloak-services: <= 26.2.5 org.keycloak:keycloak-services: >= 26.3.0, <= 26.4.7 org.keycloak:keycloak-services: >= 26.5.0, < 26.5.5

Scores and how they were measured

CVSS base severity

7.7

Version 3.1As of

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

0.4%

Scored Percentile 31.2%

Model and measurement source (opens a new tab)

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    GitHub-reviewed advisory GHSA-794g-x443-36f7 (opens a new tab)

    The public advisory supplies the description, affected package/version ranges, and any listed CVSS metric. GitHub review is not local review.

    Published Checked

  2. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-794g-x443-36f7, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  3. Primary source

    FIRST measured EPSS score (opens a new tab)

    Measured EPSS probability and percentile for CVE-2026-2092, scored 2026-10-26. This is a model estimate, not proof of exposure.

    Published Checked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 26). Keycloak: Unauthorized access via improper validation of encrypted SAML assertions (CVE-2026-2092). https://kevwire.com/record/CVE-2026-2092

MLA

"Keycloak: Unauthorized access via improper validation of encrypted SAML assertions (CVE-2026-2092)." KEVWire, 26 Oct. 2026, kevwire.com/record/CVE-2026-2092.

Chicago

KEVWire. "Keycloak: Unauthorized access via improper validation of encrypted SAML assertions (CVE-2026-2092)." Last modified October 26, 2026. https://kevwire.com/record/CVE-2026-2092.

Evidence summary (plain text)

Keycloak: Unauthorized access via improper validation of encrypted SAML assertions (Jul 2, 2026).
Keycloak's SAML broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response, injecting an encrypted assertion for an arbitrary principal, leading to unauthorized access and potential information disclosure.
CVSS 7.7 (version 3.1; evidence as of Oct 26, 2026; https://github.com/advisories/GHSA-794g-x443-36f7).
EPSS 0.4% for the following 30 days, scored Oct 26, 2026 (https://api.first.org/data/v1/epss?cve=CVE-2026-2092&date=2026-10-26).
Sources:
GitHub-reviewed advisory GHSA-794g-x443-36f7: https://github.com/advisories/GHSA-794g-x443-36f7
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc
FIRST measured EPSS score: https://api.first.org/data/v1/epss?cve=CVE-2026-2092&date=2026-10-26
Record ID: CVE-2026-2092.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 26, 2026, 19:40 UTC. Ingestion is not an independent editorial investigation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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Record details

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