CVE-2026-54783
CoreWCF: XML Signature Wrapping in WS-Security endorsing/supporting signature verification allows replay of captured signed messages
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
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 WS-Security endorsing and supporting signature verification does not ensure the selected ds:Signature covers the expected Security header target, allowing an attacker with one captured signed SOAP envelope to replay arbitrary service operations as the victim principal. This issue is fixed in versions 1.8.1 and 1.9.1.
Timeline
ID reserved
By GitHub_M
- 23 days later
· 23 days later
Published
- 2 days later
· 2 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVDNVD · Deferred | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
Weakness
- CWE-294: Authentication Bypass by Capture-replay (opens in a new tab)All about CWE-294 and its CVEs
- CWE-345: Insufficient Verification of Data Authenticity (opens in a new tab)All about CWE-345 and its CVEs
- CWE-347: Improper Verification of Cryptographic Signature (opens in a new tab)All about CWE-347 and its CVEs
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- NuGetCoreWCF.PrimitivesGHSA-gqv6-pwcg-87r8 (opens in a new tab)
References (6)
- https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-gqv6-pwcg-87r8 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/CoreWCF/CoreWCF/commit/0589692d4b9a41d21b34ac48281e95f6df7f4ce5 (opens in a new tab)x_refsource_MISC
- https://github.com/CoreWCF/CoreWCF/commit/30aef805270976c42477e3f2a05f4e563d86e247 (opens in a new tab)x_refsource_MISC
- https://github.com/CoreWCF/CoreWCF/commit/4618f24165ad018ad3ed2636bf8c3bc87d2a3be2 (opens in a new tab)x_refsource_MISC
- https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1 (opens in a new tab)x_refsource_MISC
- https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-gqv6-pwcg-87r8 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-54783)Record last updated .