8000 Fix for CVE-2026-18569 (OIDC backchannel logout fix) - fix upgrade guide in upstream by tkyjovsk · Pull Request #53689 · keycloak/keycloak · GitHub
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Fix for CVE-2026-18569 (OIDC backchannel logout fix) - fix upgrade guide in upstream - #53689

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pedroigor merged 2 commits into
keycloak:mainfrom
tkyjovsk:51381-fix-update-guide
Oct 8, 2026
Merged

pedroigor merged 2 commits into
keycloak:mainfrom
tkyjovsk:51381-fix-update-guide

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@tkyjovsk
@tkyjovsk tkyjovsk commented Oct 7, 2026
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Closes #51381.

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tkyjovsk marked this pull request as ready for review October 7, 2026 14:12
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tkyjovsk requested a review from a team as a code owner October 7, 2026 14:12
Copilot AI balanced review requested due to automatic review settings October 7, 2026 14:12
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Copilot review overview

🟢 Approval recommended

The documentation is consistently relocated without altering its technical guidance.

Review effort: Balanced
Findings: None

What changed in this PR

Relocates the CVE-2026-18569 upgrade guidance to the correct 27.0.0 release section.

Changes:

  • Adds mandatory OIDC backchannel logout signature-validation guidance to 27.0.0.
  • Removes the same guidance from 26.8.1.
File Description
changes-27_0_0.adoc Adds the upgrade guidance.
changes-26_8_1.adoc Removes the misplaced guidance.

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thank you @tkyjovsk

Copilot AI balanced review requested due to automatic review settings October 8, 2026 11:52
@tkyjovsk
tkyjovsk force-pushed the 51381-fix-update-guide branch from 5c66844 to cd9ed8b Compare October 8, 2026 11:53
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🟡 Changes recommended

The documented settings are hidden in the Admin Console while signature validation is disabled.

1 open finding

🧠 Review effort: Balanced


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…hannel logout into `changes-27_0_0.adoc`

Signed-off-by: Tomas Kyjovsky <tkyjovsk@ibm.com>
Copilot AI balanced review requested due to automatic review settings October 8, 2026 11:55
@tkyjovsk
tkyjovsk force-pushed the 51381-fix-update-guide branch from cd9ed8b to 86a3c6d Compare October 8, 2026 11:55
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🟢 Approval recommended

The documentation is consistently relocated without altering its technical guidance.

1 open finding

🧠 Review effort: Balanced


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Copilot AI balanced review requested due to automatic review settings October 8, 2026 12:59
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🟢 Approval recommended

The documentation is moved cleanly without changing its accurate security guidance.

0 open findings

1 resolved since last review

🧠 Review effort: Balanced


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@pedroigor
pedroigor enabled auto-merge (rebase) October 8, 2026 13:01
@pedroigor
pedroigor merged commit 8dc9412 into keycloak:main Oct 8, 2026
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[CVE-2026-18569] OIDC broker backchannel logout accepts unsigned forged logout tokens when signature validation is disabled

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