CVE-2026-54780
3.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| CoreWCF | CoreWCF | >= 1.9.0, < 1.9.1 | affected |
| CoreWCF | CoreWCF | < 1.8.1 | affected |
Weaknesses
- CWE-327: CWE-327: Use of a Broken or Risky Cryptographic Algorithm
- CWE-757: CWE-757: Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
References
- https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-4v55-cpmv-3vcm
- https://github.com/CoreWCF/CoreWCF/commit/58742312117cc671e6e9c694c2f5f9f669c17136
- https://github.com/CoreWCF/CoreWCF/commit/9104e581cff3d047ace5e179bfae86807a44be1f
- https://github.com/CoreWCF/CoreWCF/commit/fea67b2cd73a5a85115c325d504303ec7382e133
- https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1
- https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1
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