{"items":[{"id":"NVI-00017785","kind":"vulnerability","title":"Spring Security Vulnerable to Unauthorized User Impersonation when Using X.509 Client Certificates","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-293q-567p-wmwq","CVE-2026-47838"],"plain_summary":"GitHub lists this reviewed advisory for org.springframework.security:spring-security-web, org.springframework.security:spring-security-web, org.springframework.security:spring-security-web, org.springframework.security:spring-security-web, org.springframework.security:spring-security-web. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-6458e642c6784829bf8212680266d50f"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-30T21:35:12.000Z","value":"6.8 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-6458e642c6784829bf8212680266d50f"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-6458e642c6784829bf8212680266d50f","url":"https://github.com/advisories/GHSA-293q-567p-wmwq","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-293q-567p-wmwq","publisher":"GitHub Advisory Database","observed_at":"2026-11-05T11:39:31.286Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6458e642c6784829bf8212680266d50f"],"technology":"org.springframework.security:spring-security-web","known_exclusions":[],"conditions_summary":"In Spring Security Web, `SubjectDnX509PrincipalExtractor` does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an attacker impersonating another user.\n\n`SubjectDnX509PrincipalExtractor` is deprecated by this CVE and replaced with `SubjectX500PrincipalExtractor`. As part of updating, you should also migrate to `SubjectX500PrincipalExtractor`.\n\nAffected versions:\nSpring Security Enterprise 5.7.0 through 5.7.24; 5.8.0 through 5.8.26; 6.3.0 through 6.3.17; 6.4.0 through 6.4.17; 6.5.0 through 6.5.10. \nOSS 6.5.0 through 6.5.10.","public_affected_ranges":[">= 6.5.0, <= 6.5.10"]},{"certainty":"source_listed","source_ids":["sr-6458e642c6784829bf8212680266d50f"],"technology":"org.springframework.security:spring-security-web","known_exclusions":[],"conditions_summary":"In Spring Security Web, `SubjectDnX509PrincipalExtractor` does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an attacker impersonating another user.\n\n`SubjectDnX509PrincipalExtractor` is deprecated by this CVE and replaced with `SubjectX500PrincipalExtractor`. As part of updating, you should also migrate to `SubjectX500PrincipalExtractor`.\n\nAffected versions:\nSpring Security Enterprise 5.7.0 through 5.7.24; 5.8.0 through 5.8.26; 6.3.0 through 6.3.17; 6.4.0 through 6.4.17; 6.5.0 through 6.5.10. \nOSS 6.5.0 through 6.5.10.","public_affected_ranges":[">= 6.4.0, <= 6.4.13"]},{"certainty":"source_listed","source_ids":["sr-6458e642c6784829bf8212680266d50f"],"technology":"org.springframework.security:spring-security-web","known_exclusions":[],"conditions_summary":"In Spring Security Web, `SubjectDnX509PrincipalExtractor` does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an attacker impersonating another user.\n\n`SubjectDnX509PrincipalExtractor` is deprecated by this CVE and replaced with `SubjectX500PrincipalExtractor`. As part of updating, you should also migrate to `SubjectX500PrincipalExtractor`.\n\nAffected versions:\nSpring Security Enterprise 5.7.0 through 5.7.24; 5.8.0 through 5.8.26; 6.3.0 through 6.3.17; 6.4.0 through 6.4.17; 6.5.0 through 6.5.10. \nOSS 6.5.0 through 6.5.10.","public_affected_ranges":[">= 6.0.0, <= 6.3.10"]},{"certainty":"source_listed","source_ids":["sr-6458e642c6784829bf8212680266d50f"],"technology":"org.springframework.security:spring-security-web","known_exclusions":[],"conditions_summary":"In Spring Security Web, `SubjectDnX509PrincipalExtractor` does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an attacker impersonating another user.\n\n`SubjectDnX509PrincipalExtractor` is deprecated by this CVE and replaced with `SubjectX500PrincipalExtractor`. As part of updating, you should also migrate to `SubjectX500PrincipalExtractor`.\n\nAffected versions:\nSpring Security Enterprise 5.7.0 through 5.7.24; 5.8.0 through 5.8.26; 6.3.0 through 6.3.17; 6.4.0 through 6.4.17; 6.5.0 through 6.5.10. \nOSS 6.5.0 through 6.5.10.","public_affected_ranges":[">= 5.8.0, <= 5.8.16"]},{"certainty":"source_listed","source_ids":["sr-6458e642c6784829bf8212680266d50f"],"technology":"org.springframework.security:spring-security-web","known_exclusions":[],"conditions_summary":"In Spring Security Web, `SubjectDnX509PrincipalExtractor` does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an attacker impersonating another user.\n\n`SubjectDnX509PrincipalExtractor` is deprecated by this CVE and replaced with `SubjectX500PrincipalExtractor`. As part of updating, you should also migrate to `SubjectX500PrincipalExtractor`.\n\nAffected versions:\nSpring Security Enterprise 5.7.0 through 5.7.24; 5.8.0 through 5.8.26; 6.3.0 through 6.3.17; 6.4.0 through 6.4.17; 6.5.0 through 6.5.10. \nOSS 6.5.0 through 6.5.10.","public_affected_ranges":["<= 5.7.14"]}],"null_published_at":"2026-11-05T19:10:21.467Z","source_updated_at":"2026-06-30T21:35:12.000Z","source_disclosed_at":"2026-06-10T00:31:53.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-05T11:39:31.286Z"}],"next_cursor":null,"snapshot_revision":"42594"}