CVE-2026-54776
- Source
- https://cve.org/CVERecord?id=CVE-2026-54776
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54776.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-54776
- Aliases
- Published
- 2026-07-08T22:04:39Z
- Modified
- 2026-10-28T02:30:36Z
- Severity
-
- 4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
- Summary
- CoreWCF: Unix Domain Socket PosixIdentity transport accepts connections that skip the security upgrade
- Details
-
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, a CoreWCF service hosted on Unix Domain Sockets with PosixIdentity client credentials can accept connections that skip the application/unixposix stream upgrade before dispatching messages, bypassing framing-layer identity checks in UnixPosixIdentitySecurityUpgradeProvider. This issue is fixed in versions 1.8.1 and 1.9.1.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-306" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54776.json" }- References
-
- https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1
- https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54776.json
- https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-wjpq-6766-7f5j
- https://nvd.nist.gov/vuln/detail/CVE-2026-54776
- https://github.com/CoreWCF/CoreWCF/commit/994431268e3362c0cd126450fe2a135c202551f3
- https://github.com/CoreWCF/CoreWCF/commit/9af16955e51a57348dafce0019e259a092ef7440
- https://github.com/CoreWCF/CoreWCF/commit/f2f1a05927a88b8a75fa0582fa8ed75eb891e463
Affected packages
Git / github.com/corewcf/corewcf
Affected ranges
- Type
- GIT
- Repo
- https://github.com/corewcf/corewcf
- Events
-
IntroducedFixedIntroduced0 Unknown introduced commit / All previous commits are affectedFixedFixedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "1.9.0" }, { "fixed": "1.9.1" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "introduced": "0" }, { "fixed": "1.8.1" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "994431268e3362c0cd126450fe2a135c202551f3" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "9af16955e51a57348dafce0019e259a092ef7440" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "f2f1a05927a88b8a75fa0582fa8ed75eb891e463" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v1.8.1", "range": [ { "fixed": "7c0920fe16adc497efae82881ac0f1e4d7ac98d0" } ], "source": "REFERENCES_TAG" }, { "original_tag": "v1.9.1", "range": [ { "fixed": "1f7a0811da5128db40fd7b868ae0aac0c581f91f" } ], "source": "REFERENCES_TAG" } ] }