Vulnerability Report: GO-2026-5102
- CVE-2026-45021, GHSA-3vcp-chfh-f6r2
- Affects: github.com/kumahq/kuma, github.com/kumahq/kuma/v2
- Published: Jul 22, 2026
- Unreviewed
Default kuma-cp leaks admin token cross-origin via CORS wildcard + LocalhostIsAdmin in github.com/kumahq/kuma. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/kumahq/kuma/v2 from v2.9.0 before v2.9.15.
For detailed information about this vulnerability, visit https://github.com/kumahq/kuma/security/advisories/GHSA-3vcp-chfh-f6r2 or https://nvd.nist.gov/vuln/detail/CVE-2026-45021.
Affected Modules
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PathGo VersionsCustom Versions*
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all versions, no known fixed-
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before v2.7.25, from v2.9.13 before v2.11.13, from v2.12.4 before v2.12.10, from v2.13.0 before v2.13.5from 2.9.0 before 2.9.15
*Custom versions, which can't be mapped automatically to standard Go module versions, are ignored by govulncheck. (See this note on versions for more details.)
Aliases
References
- https://github.com/kumahq/kuma/security/advisories/GHSA-3vcp-chfh-f6r2
- https://nvd.nist.gov/vuln/detail/CVE-2026-45021
- https://github.com/kumahq/kuma/commit/8fefa8595d44eb68d922405702ed7a0826322907
- https://github.com/kumahq/kuma/pull/16416
- https://github.com/kumahq/kuma/pull/16423
- https://github.com/kumahq/kuma/pull/16424
- https://github.com/kumahq/kuma/pull/16425
- https://github.com/kumahq/kuma/pull/16426
- https://github.com/kumahq/kuma/pull/16427
- https://vuln.go.dev/ID/GO-2026-5102.json