CVE-2026-10611: An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enfor

Q: How do I fix CVE-2026-10611?

misp: upgrade to 2.5.39. Exact commands for each OS are on this page.

Q: Is CVE-2026-10611 being exploited?

CVE-2026-10611 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-10611 affect?

CVE-2026-10611 affects misp. Severity is critical (CVSS 10.0). An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement. In deployments configured with LdapAuth.mixedAuth=true and Security.require_otp=true, users authenticated through an authe

Q: How urgent is CVE-2026-10611?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 10.0REMOTEUPGRADE

CVE-2026-10611 is a critical-severity flaw (CVSS 10.0) affecting misp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement. In deployments configured with LdapAuth.mixedAuth=true and Security.require_otp=true, users authenticated through an authentication plugin, such as LDAP, may have their authenticated session established during the application beforeFilter phase before the normal login flow enforces the OTP challenge. As a result, an attacker wi

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-06-02
Last modified	2026-07-22

Publisher (CNA): CIRCL · Vendor: misp-project

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-02 14:16 UTCPublished CVE record published
2026-07-22 19:10 UTCUpdated Record last modified

misp-project misp UPGRADE

Affected: < 2.5.39

Fixed in: 2.5.39

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy misp || rpm -q misp || misp --version

2. UPGRADE to 2.5.39 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade misp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade misp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-10611?

misp: upgrade to 2.5.39. Exact commands for each OS are on this page.

Is CVE-2026-10611 being exploited?

CVE-2026-10611 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-2026-10611 affect?

CVE-2026-10611 affects misp. Severity is critical (CVSS 10.0). An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement. In deployments configured with LdapAuth.mixedAuth=true and Security.require_otp=true, users authenticated through an authe

How urgent is CVE-2026-10611?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

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References

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