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CVE-2026-54780

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, the CoreWCF WS-Security 1.0 receive pipeline validates ds:SignedInfo SignatureMethod against the configured SecurityAlgorithmSuite but does not validate each ds:Reference DigestMethod, allowing a sender to use a rejected digest algorithm such as SHA-1 while the message is still accepted. This issue is fixed in versions 1.8.1 and 1.9.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:07dc099765fc151ea8e23eef7a4c9155fd3c305264774926774aeefa3d52b8f1
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-327","description":"CWE-327: Use of a Broken or Risky Cryptographic Algorithm","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-757","description":"CWE-757: Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /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:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-327","description":"CWE-327: Use of a Broken or Risky Cryptographic Algorithm","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-757","description":"CWE-757: Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /containers/cna/problemTypes/1/descriptions/0

Source references

6 source assertions
{"name":"https://github.com/CoreWCF/CoreWCF/commit/58742312117cc671e6e9c694c2f5f9f669c17136","tags":["x_refsource_MISC"],"url":"https://github.com/CoreWCF/CoreWCF/commit/58742312117cc671e6e9c694c2f5f9f669c17136"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /containers/cna/references/1
{"name":"https://github.com/CoreWCF/CoreWCF/commit/9104e581cff3d047ace5e179bfae86807a44be1f","tags":["x_refsource_MISC"],"url":"https://github.com/CoreWCF/CoreWCF/commit/9104e581cff3d047ace5e179bfae86807a44be1f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /containers/cna/references/2
{"name":"https://github.com/CoreWCF/CoreWCF/commit/fea67b2cd73a5a85115c325d504303ec7382e133","tags":["x_refsource_MISC"],"url":"https://github.com/CoreWCF/CoreWCF/commit/fea67b2cd73a5a85115c325d504303ec7382e133"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /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:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /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:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /containers/cna/references/5
{"name":"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-4v55-cpmv-3vcm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-4v55-cpmv-3vcm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:43d6ec37a86633b5973126148f6d627f990d4177dd837f885801ee7e2f9254f0 · sha256:6b29208753f9bfdf… · /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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