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CVE-2026-54778

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 UnixDomainSocket POSIX peer identity resolution uses non-reentrant getpwuid and getgrgid calls, allowing concurrent connections to attribute one connection's identity to another or crash the host process under contention. This issue is fixed in versions 1.8.1 and 1.9.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a353a2bb6c2f281828c6f73ee23b7ae1d7e12bf311a396f22e1cde2498038a6a
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-362","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-825","description":"CWE-825: Expired Pointer Dereference","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /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:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":6.2,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-362","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-825","description":"CWE-825: Expired Pointer Dereference","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /containers/cna/problemTypes/1/descriptions/0

Source references

6 source assertions
{"name":"https://github.com/CoreWCF/CoreWCF/commit/a3d95ea4627b818995e92c7def4c016164cacfce","tags":["x_refsource_MISC"],"url":"https://github.com/CoreWCF/CoreWCF/commit/a3d95ea4627b818995e92c7def4c016164cacfce"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /containers/cna/references/1
{"name":"https://github.com/CoreWCF/CoreWCF/commit/b0acb105589b455a095ea5ff49f5191e4eeff791","tags":["x_refsource_MISC"],"url":"https://github.com/CoreWCF/CoreWCF/commit/b0acb105589b455a095ea5ff49f5191e4eeff791"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /containers/cna/references/2
{"name":"https://github.com/CoreWCF/CoreWCF/commit/b4867547c94bb088568935d581a55dda18a621e1","tags":["x_refsource_MISC"],"url":"https://github.com/CoreWCF/CoreWCF/commit/b4867547c94bb088568935d581a55dda18a621e1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /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:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /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:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /containers/cna/references/5
{"name":"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-q6v9-43v5-jv9q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-q6v9-43v5-jv9q"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c19f999212364b9407cf944cf3474098792356447ce455fb804d7c3e135c6fbd · sha256:bb81232cac1f68ab… · /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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