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CVE-2026-54779 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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 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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:4.8 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CNA: [email protected]CVSS-B:5.9 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/CoreWCF/CoreWCF/commit/3800c4e2bb4c6fde00ddacefdc2221ef33d55621	[email protected]	Source CodeVendor
https://github.com/CoreWCF/CoreWCF/commit/7b0b5231cf21b4b5c1fc3caac9981f8bee43823f	[email protected]	Source CodeVendor
https://github.com/CoreWCF/CoreWCF/commit/84f8cff5a786b5aaa73448cb379d366a7df98238	[email protected]	Source CodeVendor
https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1	[email protected]	Release NotesVendor
https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1	[email protected]	Release NotesVendor
https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-9jr3-rj99-8jq3	[email protected]	AdvisoryRemedyVendor

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-294	Authentication Bypass by Capture-replay	[email protected]
CWE-613	Insufficient Session Expiration	[email protected]

Affected Products

Product	Versions
CoreWCF.Primitives	1.8.0 (semver) 1.9.0 (semver)
CPE cpe:2.3:a:corewcf:corewcf:::::::: Remediation Upgrade: 1.8.1moderate efforthttps://www.nuget.org/packages/CoreWCF.Primitives/1.8.1 Upgrade: 1.9.1moderate efforthttps://www.nuget.org/packages/CoreWCF.Primitives/1.9.1 Workaround:moderate effort Provide your own implementation of ITokenReplayCache with the correct behavior.

Change History

2 change records found show changes

Date	Action	Recorded By
Jul 9, 2026	CVE Modified	CISA-ADP
Jul 8, 2026	New CVE Received	[email protected]