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CVE-2026-54779

CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, CoreWCF SAML token replay protection is inoperative because DefaultTokenReplayCache.TryAdd does not reject duplicate tokens when DetectReplayedTokens is enabled, allowing a captured token to be reused. This issue is fixed in versions 1.8.1 and 1.9.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:25515f810df4bada8c667332e4558c6974d42439b72720945b2900b558de94be
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-294","description":"CWE-294: Authentication Bypass by Capture-replay","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-613","description":"CWE-613: Insufficient Session Expiration","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"CoreWCF","vendor":"CoreWCF","versions":[{"status":"affected","version":">= 1.9.0, < 1.9.1"},{"status":"affected","version":"< 1.8.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-294","description":"CWE-294: Authentication Bypass by Capture-replay","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-613","description":"CWE-613: Insufficient Session Expiration","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /containers/cna/problemTypes/1/descriptions/0

Source references

6 source assertions
{"name":"https://github.com/CoreWCF/CoreWCF/commit/3800c4e2bb4c6fde00ddacefdc2221ef33d55621","tags":["x_refsource_MISC"],"url":"https://github.com/CoreWCF/CoreWCF/commit/3800c4e2bb4c6fde00ddacefdc2221ef33d55621"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /containers/cna/references/1
{"name":"https://github.com/CoreWCF/CoreWCF/commit/7b0b5231cf21b4b5c1fc3caac9981f8bee43823f","tags":["x_refsource_MISC"],"url":"https://github.com/CoreWCF/CoreWCF/commit/7b0b5231cf21b4b5c1fc3caac9981f8bee43823f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /containers/cna/references/2
{"name":"https://github.com/CoreWCF/CoreWCF/commit/84f8cff5a786b5aaa73448cb379d366a7df98238","tags":["x_refsource_MISC"],"url":"https://github.com/CoreWCF/CoreWCF/commit/84f8cff5a786b5aaa73448cb379d366a7df98238"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /containers/cna/references/3
{"name":"https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1","tags":["x_refsource_MISC"],"url":"https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /containers/cna/references/4
{"name":"https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1","tags":["x_refsource_MISC"],"url":"https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /containers/cna/references/5
{"name":"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-9jr3-rj99-8jq3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-9jr3-rj99-8jq3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:726e67bd195e746a6f1f72faf90f0b7ea2799a43c47eca9a40d0673ddeabbcd4 · sha256:3a7f1f3d8d48c8bd… · /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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