CVE-2026-85236: A cross-site request forgery (CSRF) vulnerability existed in the cullEmptyEvents action of MISP

Q: How do I fix CVE-2026-85236?

misp: upgrade to newer than 2.5.45. Exact commands for each OS are on this page.

Q: Is CVE-2026-85236 being exploited?

CVE-2026-85236 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-2026-85236 affect?

CVE-2026-85236 affects misp. Severity is high (CVSS 8.8). A cross-site request forgery (CSRF) vulnerability existed in the cullEmptyEvents action of MISP. The endpoint performed a state-changing and irreversible operation while accepting HTTP GET requests. Because bodyless GET requests are not s

Routine

HIGH 8.8UPGRADE

CVE-2026-85236 is a high-severity flaw (CVSS 8.8) affecting misp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A cross-site request forgery (CSRF) vulnerability existed in the cullEmptyEvents action of MISP. The endpoint performed a state-changing and irreversible operation while accepting HTTP GET requests. Because bodyless GET requests are not subject to CakePHP's CSRF validation, an attacker could cause an authenticated MISP user with sufficient privileges to invoke the endpoint simply by causing their browser to load a crafted URL, for example throu

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-352
Published	2026-09-03
Last modified	2026-09-11

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

Last updated 2026-09-11 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-03 16:18 UTCPublished CVE record published
2026-09-11 14:14 UTCUpdated Record last modified

misp-project misp UPGRADE

Affected: <= 2.5.45

Fixed in: newer than 2.5.45

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.5.45 (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-2026-85236?

misp: upgrade to newer than 2.5.45. Exact commands for each OS are on this page.

Is CVE-2026-85236 being exploited?

CVE-2026-85236 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-2026-85236 affect?

CVE-2026-85236 affects misp. Severity is high (CVSS 8.8). A cross-site request forgery (CSRF) vulnerability existed in the cullEmptyEvents action of MISP. The endpoint performed a state-changing and irreversible operation while accepting HTTP GET requests. Because bodyless GET requests are not s

How urgent is CVE-2026-85236?

Priority 35/100. High severity

Related CVEs

CVE-2026-85239 MEDIUM 6.5 UPGRADE A vulnerability in MISP's event template handling allowed an authenticated user with permission to create or m
CVE-2026-85238 MEDIUM 6.8 UPGRADE MISP contains a session fixation vulnerability in the CustomAuth authentication (a custom configuration) flow
CVE-2026-85237 HIGH 8.1 UPGRADE A vulnerability in MISP's email-based one-time password (OTP) authentication flow allowed an attacker to perfo
CVE-2026-85216 CRITICAL 9.8 UPGRADE MISP contains an authentication bypass vulnerability in its LDAP and LinOTP authentication components due to i
CVE-2026-85221 CRITICAL 9.1 UPGRADE MISP contains an improper TLS certificate validation vulnerability in CurlClient

References

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