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CVE-2026-41103: Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows

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CRITICAL 9.1REMOTEWATCHLISTUPGRADEUPGRADE

CVE-2026-41103 is a critical-severity flaw (CVSS 9.1) affecting confluence saml sso, jira saml sso. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network.

Why this priority

  • Critical severity
  • EPSS top 7%: very likely to be exploited
  • CISA SSVC: automatable with total technical impact
  • Remotely exploitable, no login, no user action
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score9.1 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance5.4% (top 7%)
CISA exploited listNo
WeaknessCWE-303
Published2026-05-12
Last modified2026-10-26
Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Share: LinkedIn · X · Reddit

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

microsoft confluence saml sso UPGRADE
Affected: < 7.4.0
Fixed in: 7.4.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy confluence-saml-sso || rpm -q confluence-saml-sso || confluence-saml-sso --version
2. UPGRADE to 7.4.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade confluence-saml-sso
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade confluence-saml-sso
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
microsoft jira saml sso UPGRADE
Affected: < 1.3.3
Fixed in: 1.3.3
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy jira-saml-sso || rpm -q jira-saml-sso || jira-saml-sso --version
2. UPGRADE to 1.3.3 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade jira-saml-sso
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade jira-saml-sso
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora ELN · xfsdump · FIXED · 3.3.0-3.eln159 · FEDORA-2026-6e9bb3f901 · source
sudo dnf upgrade --advisory=FEDORA-2026-6e9bb3f901
Fedora 46 · fio · FIXED · 3.43-2.fc46 · FEDORA-2026-b36219886b · source
sudo dnf upgrade --advisory=FEDORA-2026-b36219886b
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41103?

confluence saml sso: upgrade to 7.4.0; jira saml sso: upgrade to 1.3.3. Exact commands for each OS are on this page.

Is CVE-2026-41103 being exploited?

CVE-2026-41103 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41103 affect?

CVE-2026-41103 affects confluence saml sso, jira saml sso. Severity is critical (CVSS 9.1). Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira &amp; Confluence allows an unauthorized attacker to elevate privileges over a network.

How urgent is CVE-2026-41103?

Priority 68/100. Critical severity; EPSS top 7%: very likely to be exploited; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Atlassian Confluence vulnerabilities · Atlassian Jira vulnerabilities

References

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