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CVE-2026-96446

Keycloak-services: keycloak-services: par single-use bypass via prompt=none silent authentication path

Products / packages Red Hat build of Keycloak 26.6.8 · Red Hat Single Sign-On 7

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 21:25:33 UTC
redhat · CVSS:3.1 · 4.2
Assessment vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Severity

medium4.2

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Source guidance available

Review the recorded instructions. Guidance may be a workaround rather than a fixed version.

What this means

A flaw in Keycloak's Pushed Authorization Request implementation allows bypassing a security rule when using silent authentication, potentially enabling reuse of a request URI to obtain multiple authorization codes. The issue affects unknown versions of Keycloak. An attacker may exploit this if a user is already logged in.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Red Hat · redhat

Red Hat build of Keycloak 26.6.8

0 ranges
redhat version evidence

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affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/a:redhat:build_keycloak:26.6::el9

Red Hat · redhat

Red Hat build of Keycloak 26.6.8

0 ranges
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/a:redhat:build_keycloak:26.6::el9

Red Hat · redhat

Red Hat Single Sign-On 7

0 ranges
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/a:redhat:red_hat_single_sign_on:7
Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

redhat guidance ↗

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

A flaw was found in the Pushed Authorization Request PAR implementation of Keycloak. The issue occurs when the silent authentication path prompt=none is used, which allows the authorization process to skip certain steps if a user is already logged in. Due to this bypass, the security rule that ensures a pushed request URI is used only once is not enforced. An attacker could potentially reuse a request URI to obtain multiple authorization codes for a user who is already signed in, violating security standards like FAPI-2.

References

3 sources
access.redhat.com/errata/RHSA-2026:95761
Vendor advisoryredhat
access.redhat.com/security/cve/CVE-2026-96446
Security advisoryredhat
bugzilla.redhat.com/show_bug.cgi
Source referenceredhat

Inside the record

Evidence available

Package identity · not supplied
Version evidence · not supplied
Remediation guidance
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-96446

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-862 ↗

Missing Authorization

redhat

Related →
Contributing organizations · 2
redhat

Assigning organization

2026-11-06
CISA-ADP

Additional data publisher

2026-09-26

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

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Large field values are marked as truncated previews. Original source snapshots remain retained.