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CVE-2026-76271 is an inefficient regular-expression vulnerability in the Discover Splunk Observability Cloud app included with Splunk Enterprise. Input validation at a REST API endpoint permits a low-privileged user without the admin or power roles to trigger excessive regular-expression processing and cause denial of service. Affected release branches include 10.4.x before 10.4.3, 10.2.x before 10.2.7, and 10.0.x before 10.0.10.
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Splunk Enterprise denial-of-service vulnerability exploitable by a low-privileged user without admin or power roles. CVSS 6.5. Affects all four listed Enterprise branches; fixed releases are 10.4.3, 10.2.7, 10.0.10, and 9.4.15.
An inefficient regular expression used to validate REST API input in the Discover Splunk Observability Cloud app allows a low-privileged Splunk user to cause denial of service. Affected Splunk Enterprise release branches have fix thresholds of 10.4.3, 10.2.7, and 10.0.10. Versions 9.4.x are explicitly unaffected.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.