Critical unauthenticated data-exposure in widely deployed Splunk Enterprise; can leak session material and sensitive logs across organizations.
CVE-2026-76311
Unauthenticated download of embedded report archives exposes Splunk session data.
Is CVE-2026-76311 being exploited?
Not confirmed. CVE-2026-76311 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 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-76311?
CVE-2026-76311 is rated Critical with a CVSS score of 9.4. 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-2026-76311?
Yes. A fix has been recorded for CVE-2026-76311. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-76311 affect?
CVE-2026-76311 affects Splunk Enterprise < 10.4.2, Splunk Enterprise < 10.2.6, Splunk Enterprise < 10.0.9, Splunk Enterprise < 9.4.14, and 1 further product or version. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-76311?
Upgrade to 10.4.2/10.2.6/10.0.9/9.4.14, disable embedded reports or revoke tokens until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker with an embedded report token can download dispatch archives, extract session credentials, access/steal data and affect instance integrity.
Immediate action required
- affected>= 10.4 and < 10.4.2
- affected>= 10.2 and < 10.2.6
- affected>= 10.0 and < 10.0.9
- affected>= 9.4 and < 9.4.14
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.