CVE Explorer
CVE-2026-40574
OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Prior to 7.15.2, an authorization bypass exists in OAuth2 Proxy as part of the email_domain enforcement option. An attacker may be able to authenticate with an email claim such as attacker@evil.com@company.com and satisfy an allowed domain check for company.com, even though the claim is not a valid email address. The issue ONLY affects deployments that rely on email_domain restrictions and accept email claim val
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"oauth2-proxy","vendor":"oauth2-proxy","versions":[{"status":"affected","version":"< 7.15.2"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:4671a9bd4f9f6c562db229929ca74cea51cd0ff0a3e0cecf42b772551e7255b6 · sha256:1552f3ebd1d549a1… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:4671a9bd4f9f6c562db229929ca74cea51cd0ff0a3e0cecf42b772551e7255b6 · sha256:1552f3ebd1d549a1… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:4671a9bd4f9f6c562db229929ca74cea51cd0ff0a3e0cecf42b772551e7255b6 · sha256:1552f3ebd1d549a1… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-c5c4-8r6x-56w3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-c5c4-8r6x-56w3"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4671a9bd4f9f6c562db229929ca74cea51cd0ff0a3e0cecf42b772551e7255b6 · sha256:1552f3ebd1d549a1… · /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.