CVE-2026-25773: UNSUPPORTED WHEN ASSIGNED Focalboard version 8.0 fails to sanitize category IDs before incorporating the

Routine

HIGH 8.1DOWNGRADE

CVE-2026-25773 is a high-severity flaw (CVSS 8.1) affecting focalboard. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to sanitize category IDs before incorporating them into dynamic SQL statements when reordering categories. An attacker can inject a malicious SQL payload into the category id field, which is stored in the database and later executed unsanitized when the category reorder API processes the stored value. This Second-Order SQL Injection (Time-Based Blind) allows an authenticated attacker to

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-89
Published	2026-04-03
Last modified	2026-07-24

Publisher (CNA): Mattermost, Inc. · Vendor: mattermost

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-03 14:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

mattermost focalboard DOWNGRADE

Affected: 8.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 8.0.0 (Debian / Ubuntu)

apt-cache madison focalboard sudo apt install focalboard=<VERSION_BEFORE_8.0.0> sudo apt-mark hold focalboard

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list focalboard sudo dnf downgrade focalboard-<VERSION_BEFORE_8.0.0> sudo dnf versionlock add focalboard

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-25773?

focalboard: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-25773 being exploited?

CVE-2026-25773 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-2026-25773 affect?

CVE-2026-25773 affects focalboard. Severity is high (CVSS 8.1). ** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to sanitize category IDs before incorporating them into dynamic SQL statements when reordering categories. An attacker can inject a malicious SQL payload into the category id fiel

How urgent is CVE-2026-25773?

Priority 34/100. High severity

Software pages

Mattermost vulnerabilities

Related CVEs

CVE-2026-28736 MEDIUM 4.3 DOWNGRADE ** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to validate file ownership when serving uploaded

References

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CVE-2026-25773: ** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to sanitize category IDs before incorporating the