{"schema_version":1,"title":"github.com/oauth2-proxy/oauth2-proxy (Go) vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 11 vulnerabilities in github.com/oauth2-proxy/oauth2-proxy (Go): 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-41059, was published on 15 April 2026.","url":"https://junglewise.ai/threats/technologies/github-com-oauth2-proxy-oauth2-proxy","json_url":"https://junglewise.ai/threats/technologies/github-com-oauth2-proxy-oauth2-proxy.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/github-com-oauth2-proxy-oauth2-proxy","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":1,"all_time":11,"critical":1,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":0,"last_365_days":5},"latest":[{"cve":"CVE-2026-41059","cvss":8.2,"epss":0.0043,"slug":"cve-2026-41059-oauth2-proxy-has-an-authentication-bypass-via-fragment-confusion","title":"OAuth2 Proxy has an Authentication Bypass via Fragment Confusion in skip_auth_routes and skip_auth_regex","severity":"high","exploited":false,"published_at":"2026-04-15T19:24:13+00:00","url":"https://junglewise.ai/threats/cve-2026-41059-oauth2-proxy-has-an-authentication-bypass-via-fragment-confusion"},{"cve":"CVE-2026-40574","cvss":6.8,"epss":0.0034,"slug":"cve-2026-40574-oauth2-proxy-has-an-authorization-bypass-in-email-domain","title":"OAuth2 Proxy has an Authorization Bypass in Email Domain Validation via Malformed Multi-@ Email Claims","severity":"medium","exploited":false,"published_at":"2026-04-15T19:23:54+00:00","url":"https://junglewise.ai/threats/cve-2026-40574-oauth2-proxy-has-an-authorization-bypass-in-email-domain"},{"cve":"CVE-2026-34457","cvss":9.1,"epss":0.0066,"slug":"cve-2026-34457-oauth2-proxy-authentication-bypass-via-health-check-user-agent","title":"OAuth2 Proxy authentication bypass via health check User-Agent spoofing","severity":"critical","exploited":false,"published_at":"2026-04-14T23:16:28.33+00:00","url":"https://junglewise.ai/threats/cve-2026-34457-oauth2-proxy-authentication-bypass-via-health-check-user-agent"},{"cve":"CVE-2026-34454","cvss":3.5,"epss":0.0022,"slug":"cve-2026-34454-oauth2-proxy-insufficient-session-expiration-in-sign-in-page","title":"OAuth2 Proxy insufficient session expiration in sign-in page handler","severity":"low","exploited":false,"published_at":"2026-04-14T23:16:28.167+00:00","url":"https://junglewise.ai/threats/cve-2026-34454-oauth2-proxy-insufficient-session-expiration-in-sign-in-page"},{"cve":"CVE-2025-64484","cvss":3.1,"epss":0.0062,"slug":"cve-2025-64484-oauth2-proxy-is-vulnerable-to-header-smuggling-via-underscore","title":"GO-2025-4113 - OAuth2-Proxy is vulnerable to header smuggling via underscore leading to potential privilege escalation in github.com/oauth2-proxy/oauth2-pr","severity":"low","exploited":false,"published_at":"2025-11-17T19:11:23+00:00","url":"https://junglewise.ai/threats/cve-2025-64484-oauth2-proxy-is-vulnerable-to-header-smuggling-via-underscore"},{"cve":"CVE-2021-21411","cvss":3.1,"epss":0.0099,"slug":"cve-2021-21411-oauth2-proxy-s-gitlab-group-gitlab-group-authorization-config","title":"GO-2025-3832 - OAuth2-Proxy's `--gitlab-group` GitLab Group Authorization config flag stopped working in v7.0.0 in github.com/oauth2-proxy/oauth2-proxy","severity":"low","exploited":false,"published_at":"2025-08-11T17:24:51+00:00","url":"https://junglewise.ai/threats/cve-2021-21411-oauth2-proxy-s-gitlab-group-gitlab-group-authorization-config"},{"cve":"CVE-2025-54576","cvss":3.1,"epss":0.0117,"slug":"cve-2025-54576-oauth2-proxy-has-authentication-bypass-in-oauth2-proxy-skip-auth","title":"GO-2025-3833 - OAuth2-Proxy has authentication bypass in oauth2-proxy skip_auth_routes due to Query Parameter inclusion in github.com/oauth2-proxy/oauth2-p","severity":"low","exploited":false,"published_at":"2025-08-11T17:24:51+00:00","url":"https://junglewise.ai/threats/cve-2025-54576-oauth2-proxy-has-authentication-bypass-in-oauth2-proxy-skip-auth"},{"cve":"CVE-2021-21291","cvss":3.1,"epss":0.0158,"slug":"cve-2021-21291-subdomain-checking-of-whitelisted-domains-could-allow-unintended","title":"GO-2022-0790 - Subdomain checking of whitelisted domains could allow unintended redirects in oauth2-proxy in github.com/oauth2-proxy/oauth2-proxy","severity":"low","exploited":false,"published_at":"2024-08-21T15:28:59+00:00","url":"https://junglewise.ai/threats/cve-2021-21291-subdomain-checking-of-whitelisted-domains-could-allow-unintended"},{"cve":"CVE-2020-5233","cvss":3.1,"epss":0.013,"slug":"cve-2020-5233-the-pattern-domain-com-is-not-disallowed-when-redirecting-allowing","title":"The pattern '/\\domain.com' is not disallowed when redirecting, allowing for open redirect","severity":"low","exploited":false,"published_at":"2021-12-20T18:02:38+00:00","url":"https://junglewise.ai/threats/cve-2020-5233-the-pattern-domain-com-is-not-disallowed-when-redirecting-allowing"},{"cve":"CVE-2020-11053","cvss":3.1,"epss":0.0079,"slug":"cve-2020-11053-open-redirect-in-oauth2-proxy","title":"Open Redirect in OAuth2 Proxy","severity":"low","exploited":false,"published_at":"2021-12-20T17:59:10+00:00","url":"https://junglewise.ai/threats/cve-2020-11053-open-redirect-in-oauth2-proxy"},{"cve":"CVE-2020-4037","cvss":3.1,"epss":0.009,"slug":"cve-2020-4037-open-redirect-in-oauth2-proxy","title":"Open Redirect in OAuth2 Proxy","severity":"low","exploited":false,"published_at":"2021-12-20T17:58:59+00:00","url":"https://junglewise.ai/threats/cve-2020-4037-open-redirect-in-oauth2-proxy"}],"weekly":[{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"github.com/mattermost/mattermost-server (Go)","slug":"github-com-mattermost-mattermost-server","vulnerabilities":274,"url":"https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server"},{"name":"github.com/mattermost/mattermost-server/v6 (Go)","slug":"github-com-mattermost-mattermost-server-v6","vulnerabilities":188,"url":"https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server-v6"},{"name":"github.com/mattermost/mattermost-server/v5 (Go)","slug":"github-com-mattermost-mattermost-server-v5","vulnerabilities":186,"url":"https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server-v5"},{"name":"github.com/mattermost/mattermost/server/v8 (Go)","slug":"github-com-mattermost-mattermost-server-v8","vulnerabilities":182,"url":"https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server-v8"},{"name":"stdlib (Go)","slug":"go-stdlib","vulnerabilities":161,"url":"https://junglewise.ai/threats/technologies/go-stdlib"},{"name":"github.com/siyuan-note/siyuan/kernel (Go)","slug":"github-com-siyuan-note-siyuan-kernel","vulnerabilities":158,"url":"https://junglewise.ai/threats/technologies/github-com-siyuan-note-siyuan-kernel"},{"name":"code.gitea.io/gitea (Go)","slug":"code-gitea-io-gitea","vulnerabilities":128,"url":"https://junglewise.ai/threats/technologies/code-gitea-io-gitea"},{"name":"gogs.io/gogs (Go)","slug":"gogs-io-gogs","vulnerabilities":82,"url":"https://junglewise.ai/threats/technologies/gogs-io-gogs"},{"name":"github.com/traefik/traefik (Go)","slug":"github-com-traefik-traefik","vulnerabilities":75,"url":"https://junglewise.ai/threats/technologies/github-com-traefik-traefik"},{"name":"github.com/usememos/memos (Go)","slug":"github-com-usememos-memos","vulnerabilities":75,"url":"https://junglewise.ai/threats/technologies/github-com-usememos-memos"},{"name":"github.com/traefik/traefik/v2 (Go)","slug":"github-com-traefik-traefik-v2","vulnerabilities":73,"url":"https://junglewise.ai/threats/technologies/github-com-traefik-traefik-v2"},{"name":"github.com/traefik/traefik/v3 (Go)","slug":"github-com-traefik-traefik-v3","vulnerabilities":68,"url":"https://junglewise.ai/threats/technologies/github-com-traefik-traefik-v3"}],"technology":{"hub":true,"name":"github.com/oauth2-proxy/oauth2-proxy (Go)","slug":"github-com-oauth2-proxy-oauth2-proxy","vendor":{"name":"Go","slug":"go","url":"https://junglewise.ai/threats/vendors/go"},"aliases":[],"homepage":"https://oauth2-proxy.github.io/oauth2-proxy/","repo_url":"https://github.com/oauth2-proxy/oauth2-proxy","description":"A reverse proxy and static file server that provides authentication using various providers.","url":"https://junglewise.ai/threats/technologies/github-com-oauth2-proxy-oauth2-proxy"},"most_severe":[{"cve":"CVE-2026-34457","cvss":9.1,"epss":0.0066,"slug":"cve-2026-34457-oauth2-proxy-authentication-bypass-via-health-check-user-agent","title":"OAuth2 Proxy authentication bypass via health check User-Agent spoofing","severity":"critical","exploited":false,"published_at":"2026-04-14T23:16:28.33+00:00","url":"https://junglewise.ai/threats/cve-2026-34457-oauth2-proxy-authentication-bypass-via-health-check-user-agent"},{"cve":"CVE-2026-41059","cvss":8.2,"epss":0.0043,"slug":"cve-2026-41059-oauth2-proxy-has-an-authentication-bypass-via-fragment-confusion","title":"OAuth2 Proxy has an Authentication Bypass via Fragment Confusion in skip_auth_routes and skip_auth_regex","severity":"high","exploited":false,"published_at":"2026-04-15T19:24:13+00:00","url":"https://junglewise.ai/threats/cve-2026-41059-oauth2-proxy-has-an-authentication-bypass-via-fragment-confusion"},{"cve":"CVE-2026-40574","cvss":6.8,"epss":0.0034,"slug":"cve-2026-40574-oauth2-proxy-has-an-authorization-bypass-in-email-domain","title":"OAuth2 Proxy has an Authorization Bypass in Email Domain Validation via Malformed Multi-@ Email Claims","severity":"medium","exploited":false,"published_at":"2026-04-15T19:23:54+00:00","url":"https://junglewise.ai/threats/cve-2026-40574-oauth2-proxy-has-an-authorization-bypass-in-email-domain"},{"cve":"CVE-2026-34454","cvss":3.5,"epss":0.0022,"slug":"cve-2026-34454-oauth2-proxy-insufficient-session-expiration-in-sign-in-page","title":"OAuth2 Proxy insufficient session expiration in sign-in page handler","severity":"low","exploited":false,"published_at":"2026-04-14T23:16:28.167+00:00","url":"https://junglewise.ai/threats/cve-2026-34454-oauth2-proxy-insufficient-session-expiration-in-sign-in-page"},{"cve":"CVE-2021-21291","cvss":3.1,"epss":0.0158,"slug":"cve-2021-21291-subdomain-checking-of-whitelisted-domains-could-allow-unintended","title":"GO-2022-0790 - Subdomain checking of whitelisted domains could allow unintended redirects in oauth2-proxy in github.com/oauth2-proxy/oauth2-proxy","severity":"low","exploited":false,"published_at":"2024-08-21T15:28:59+00:00","url":"https://junglewise.ai/threats/cve-2021-21291-subdomain-checking-of-whitelisted-domains-could-allow-unintended"},{"cve":"CVE-2020-5233","cvss":3.1,"epss":0.013,"slug":"cve-2020-5233-the-pattern-domain-com-is-not-disallowed-when-redirecting-allowing","title":"The pattern '/\\domain.com' is not disallowed when redirecting, allowing for open redirect","severity":"low","exploited":false,"published_at":"2021-12-20T18:02:38+00:00","url":"https://junglewise.ai/threats/cve-2020-5233-the-pattern-domain-com-is-not-disallowed-when-redirecting-allowing"},{"cve":"CVE-2025-54576","cvss":3.1,"epss":0.0117,"slug":"cve-2025-54576-oauth2-proxy-has-authentication-bypass-in-oauth2-proxy-skip-auth","title":"GO-2025-3833 - OAuth2-Proxy has authentication bypass in oauth2-proxy skip_auth_routes due to Query Parameter inclusion in github.com/oauth2-proxy/oauth2-p","severity":"low","exploited":false,"published_at":"2025-08-11T17:24:51+00:00","url":"https://junglewise.ai/threats/cve-2025-54576-oauth2-proxy-has-authentication-bypass-in-oauth2-proxy-skip-auth"},{"cve":"CVE-2021-21411","cvss":3.1,"epss":0.0099,"slug":"cve-2021-21411-oauth2-proxy-s-gitlab-group-gitlab-group-authorization-config","title":"GO-2025-3832 - OAuth2-Proxy's `--gitlab-group` GitLab Group Authorization config flag stopped working in v7.0.0 in github.com/oauth2-proxy/oauth2-proxy","severity":"low","exploited":false,"published_at":"2025-08-11T17:24:51+00:00","url":"https://junglewise.ai/threats/cve-2021-21411-oauth2-proxy-s-gitlab-group-gitlab-group-authorization-config"},{"cve":"CVE-2020-4037","cvss":3.1,"epss":0.009,"slug":"cve-2020-4037-open-redirect-in-oauth2-proxy","title":"Open Redirect in OAuth2 Proxy","severity":"low","exploited":false,"published_at":"2021-12-20T17:58:59+00:00","url":"https://junglewise.ai/threats/cve-2020-4037-open-redirect-in-oauth2-proxy"},{"cve":"CVE-2020-11053","cvss":3.1,"epss":0.0079,"slug":"cve-2020-11053-open-redirect-in-oauth2-proxy","title":"Open Redirect in OAuth2 Proxy","severity":"low","exploited":false,"published_at":"2021-12-20T17:59:10+00:00","url":"https://junglewise.ai/threats/cve-2020-11053-open-redirect-in-oauth2-proxy"}],"generated_at":"2026-09-28T03:07:00.154823+00:00"}