CVE-2026-24044
Insecure Matrix key generation in ESS Community Helm Chart.
Is CVE-2026-24044 being exploited?
Not confirmed. CVE-2026-24044 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.29% probability of exploitation in the next 30 days.
How severe is CVE-2026-24044?
CVE-2026-24044 is rated Critical with a CVSS score of 9.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-24044?
Yes. A fix has been recorded for CVE-2026-24044. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-24044 affect?
CVE-2026-24044 affects ESS Community Helm Chart, Matrix deployments using ESS Community, matrix-tools < 0.5.7. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-24044?
Upgrade to ESS 25.12.1 and matrix-tools 0.5.7+; redeploy with secure keys.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Impersonate Matrix server via forged keys; affects rooms where vulnerable server is a member; confidentiality, integrity, and availability risks.
Immediate action required
- affected< 25.12.1
- affected< 0.5.7
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.