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CVE-2026-39350

Istio is an open platform to connect, manage, and secure microservices. In versions 1.25.0 through 1.27.8, 1.28.0 through 1.28.5, 1.29.0, and 1.29.1, the serviceAccounts and notServiceAccounts fields in AuthorizationPolicy incorrectly interpret dots (.) as a regular expression matcher. Because . is a valid character in a service account name, an AuthorizationPolicy ALLOW rule targeting a service account such as cert-manager.io also matches cert-manager-io, cert-managerXio, etc. A DENY rule targe
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f8ad254f04b8060c0b56af5a0082754dcf3190154b727e8bf5d7338976491557
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-185","description":"CWE-185: Incorrect Regular Expression","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:395fed4a593d6b955fa73c7cc8c87f78a8487ee017f87247853bcdd81b8cac93 · sha256:22ed1e189e7a981f… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:395fed4a593d6b955fa73c7cc8c87f78a8487ee017f87247853bcdd81b8cac93 · sha256:22ed1e189e7a981f… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"istio","vendor":"istio","versions":[{"status":"affected","version":">= 1.25.0, < < 1.27.9"},{"status":"affected","version":">= 1.28.0, < 1.28.6"},{"status":"affected","version":">= 1.29.0, < 1.29.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:395fed4a593d6b955fa73c7cc8c87f78a8487ee017f87247853bcdd81b8cac93 · sha256:22ed1e189e7a981f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:395fed4a593d6b955fa73c7cc8c87f78a8487ee017f87247853bcdd81b8cac93 · sha256:22ed1e189e7a981f… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-185","description":"CWE-185: Incorrect Regular Expression","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:395fed4a593d6b955fa73c7cc8c87f78a8487ee017f87247853bcdd81b8cac93 · sha256:22ed1e189e7a981f… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:395fed4a593d6b955fa73c7cc8c87f78a8487ee017f87247853bcdd81b8cac93 · sha256:22ed1e189e7a981f… · /containers/cna/problemTypes/1/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/istio/istio/security/advisories/GHSA-9gcg-w975-3rjh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/istio/istio/security/advisories/GHSA-9gcg-w975-3rjh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:395fed4a593d6b955fa73c7cc8c87f78a8487ee017f87247853bcdd81b8cac93 · sha256:22ed1e189e7a981f… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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