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CVE-2026-42565

@workos/authkit-session is a toolkit for building WorkOS AuthKit framework integrations. Prior to 0.5.1, an open redirect vulnerability exists in AuthService.handleCallback due to insufficient validation of the returnPathname value derived from the OAuth state parameter. The state parameter is round-tripped through the identity provider (IdP) and can be influenced by an attacker. The handleCallback function decodes and returns returnPathname without enforcing restrictions on origin or scheme. As
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9ef5b1e3fd4808a3516b2b8d607586c5b683d90be7ff9172b20a7ab0bffeddc9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"authkit-session","vendor":"workos","versions":[{"status":"affected","version":"< 0.5.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:382c1642fb84f74f0f3c25be40711639232e561cc12bad081b18be791b9a3863 · sha256:78fd7e888536d591… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:382c1642fb84f74f0f3c25be40711639232e561cc12bad081b18be791b9a3863 · sha256:78fd7e888536d591… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-601","description":"CWE-601: URL Redirection to Untrusted Site ('Open Redirect')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:382c1642fb84f74f0f3c25be40711639232e561cc12bad081b18be791b9a3863 · sha256:78fd7e888536d591… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/workos/authkit-session/commit/f56e1d6214a93160759e5677b7a3d772b244db39","tags":["x_refsource_MISC"],"url":"https://github.com/workos/authkit-session/commit/f56e1d6214a93160759e5677b7a3d772b244db39"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:382c1642fb84f74f0f3c25be40711639232e561cc12bad081b18be791b9a3863 · sha256:78fd7e888536d591… · /containers/cna/references/1
{"name":"https://github.com/workos/authkit-session/releases/tag/v0.5.1","tags":["x_refsource_MISC"],"url":"https://github.com/workos/authkit-session/releases/tag/v0.5.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:382c1642fb84f74f0f3c25be40711639232e561cc12bad081b18be791b9a3863 · sha256:78fd7e888536d591… · /containers/cna/references/2
{"name":"https://github.com/workos/authkit-session/security/advisories/GHSA-vvvv-983w-r7pv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/workos/authkit-session/security/advisories/GHSA-vvvv-983w-r7pv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:382c1642fb84f74f0f3c25be40711639232e561cc12bad081b18be791b9a3863 · sha256:78fd7e888536d591… · /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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