CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Called exploited 36 days after disclosure.
Measured from the CVE publication date to the earliest of 1 KEV catalogue that list it.
The life of this vulnerability
- CVE published
- First KEV listing36d
- Last sighting12d
Gaps are compressed to equal steps. The elapsed time is printed under each.
Which catalogues call it exploited
- CISA KEVUS federaldoes not list it
- EUVDENISA, European Uniondoes not list it
- VulnCheck KEVcommercial researchlisted Aug 1, 2026
- CIRCLaggregator, mirrors the abovedoes not list it
This rests on a single catalogue. No second catalogue corroborates the claim that it is being exploited. CIRCL is an aggregator and is not counted.
Public exploitation evidence
- reported exploitationapi.vulncheck.com/v3/index/vulncheck-canaries?cve=CVE-2026-5
- reported exploitationapi.vulncheck.com/v3/index/vulncheck-canaries?cve=CVE-2026-5
- reported exploitationapi.vulncheck.com/v3/index/vulncheck-canaries?cve=CVE-2026-5
- reported exploitationapi.vulncheck.com/v3/index/vulncheck-canaries?cve=CVE-2026-5
- reported exploitationapi.vulncheck.com/v3/index/vulncheck-canaries?cve=CVE-2026-5
- reported exploitationapi.vulncheck.com/v3/index/vulncheck-canaries?cve=CVE-2026-5
9 public reports collected from VulnCheck and CIRCL, first on Aug 1, 2026. Each links to its original source. We have not verified them.
Description
Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter for the REST API (@Filter("/api/v1/**")) treats any request whose path ends in /configs as the public instance-config endpoint and forwards it without a credential check. kestra addresses its resources by URL path segments that the caller chooses (/api/v1/{tenant}/flows/{namespace}, /api/v1/{tenant}/executions/{namespace}/{id}, /api/v1/{tenant}/namespaces/{namespace}/kv/{key}). An anonymous caller picks the literal configs as the final segment, and the request bypasses Basic-Auth entirely. Because the bypass reaches the flow-create and execution-trigger routes, an unauthentica