{"url":"http://public2.vulnerablecode.io/api/packages/550507?format=json","purl":"pkg:maven/org.pac4j/pac4j-core@4.5.4","type":"maven","namespace":"org.pac4j","name":"pac4j-core","version":"4.5.4","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"5.7.10","latest_non_vulnerable_version":"6.4.1","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/89494?format=json","vulnerability_id":"VCID-8bx1-jxeh-j7e6","summary":"PAC4J has a Cross-Site Request Forgery (CSRF) Vulnerability\nPAC4J is vulnerable to Cross-Site Request Forgery (CSRF). A malicious attacker can craft a specially designed website which, when visited by a user, will automatically submit a forged cross-site request with a token whose hash collides with the victim's legitimate CSRF token. Importantly, the attacker does not need to know the victim’s CSRF token or its hash prior to the attack. Collisions in the deterministic String.hashCode() function can be computed directly, reducing the effective token's security space to 32 bits. This bypasses CSRF protection, allowing profile updates, password changes, account linking, and any other state-changing operations to be performed without the victim's consent.\n\nThis issue was fixed in PAC4J versions 5.7.10 and 6.4.1.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-40458","reference_id":"","reference_type":"","scores":[{"value":"6e-05","scoring_system":"epss","scoring_elements":"0.00401","published_at":"2026-06-07T12:55:00Z"},{"value":"6e-05","scoring_system":"epss","scoring_elements":"0.004","published_at":"2026-06-09T12:55:00Z"},{"value":"6e-05","scoring_system":"epss","scoring_elements":"0.00399","published_at":"2026-06-08T12:55:00Z"},{"value":"6e-05","scoring_system":"epss","scoring_elements":"0.00405","published_at":"2026-06-05T12:55:00Z"},{"value":"6e-05","scoring_system":"epss","scoring_elements":"0.00407","published_at":"2026-06-06T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-40458"},{"reference_url":"https://cert.pl/en/posts/2026/04/CVE-2026-40458","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},{"value":"7.0","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://cert.pl/en/posts/2026/04/CVE-2026-40458"},{"reference_url":"https://github.com/pac4j/pac4j","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},{"value":"7.0","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pac4j/pac4j"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40458","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},{"value":"7.0","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40458"},{"reference_url":"https://www.pac4j.org/blog/security-advisory-pac4j-core-and-ldap.html","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},{"value":"7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N"},{"value":"7.0","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-17T13:57:28Z/"}],"url":"https://www.pac4j.org/blog/security-advisory-pac4j-core-and-ldap.html"},{"reference_url":"https://cert.pl/en/posts/2026/04/CVE-2026-40458/","reference_id":"CVE-2026-40458","reference_type":"","scores":[{"value":"7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-17T13:57:28Z/"}],"url":"https://cert.pl/en/posts/2026/04/CVE-2026-40458/"},{"reference_url":"https://github.com/advisories/GHSA-xw5c-jc7x-gf75","reference_id":"GHSA-xw5c-jc7x-gf75","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-xw5c-jc7x-gf75"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/110684?format=json","purl":"pkg:maven/org.pac4j/pac4j-core@5.7.10","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:maven/org.pac4j/pac4j-core@5.7.10"},{"url":"http://public2.vulnerablecode.io/api/packages/110685?format=json","purl":"pkg:maven/org.pac4j/pac4j-core@6.4.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:maven/org.pac4j/pac4j-core@6.4.1"}],"aliases":["CVE-2026-40458","GHSA-xw5c-jc7x-gf75"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-8bx1-jxeh-j7e6"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/41989?format=json","vulnerability_id":"VCID-mcvx-6zuz-mkcy","summary":"Improper Verification of Cryptographic Signature\nPac4j v5.1 allows (by default) clients to accept and successfully validate ID Tokens with `none` algorithm (i.e., tokens with no signature) which is not secure and violates the OpenID Core Specification. The `none` algorithm does not require any signature verification when validating the ID tokens, which allows the attacker to bypass the token validation by injecting a malformed ID token using `none` as the value of `alg` key in the header with an empty signature value.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-44878","reference_id":"","reference_type":"","scores":[{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33628","published_at":"2026-06-04T12:55:00Z"},{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33698","published_at":"2026-06-09T12:55:00Z"},{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33673","published_at":"2026-06-08T12:55:00Z"},{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33708","published_at":"2026-06-07T12:55:00Z"},{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33742","published_at":"2026-06-06T12:55:00Z"},{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33729","published_at":"2026-06-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-44878"},{"reference_url":"https://github.com/pac4j/pac4j","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pac4j/pac4j"},{"reference_url":"https://github.com/pac4j/pac4j/commit/09684e0de1c4753d22c53b8135d4ef61cfda76f7","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pac4j/pac4j/commit/09684e0de1c4753d22c53b8135d4ef61cfda76f7"},{"reference_url":"https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae"},{"reference_url":"https://github.com/pac4j/pac4j/commit/9c87bbc536ed5d05f940ae015403120df2935589","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pac4j/pac4j/commit/9c87bbc536ed5d05f940ae015403120df2935589"},{"reference_url":"https://openid.net/specs/openid-connect-core-1_0.html#IDToken","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://openid.net/specs/openid-connect-core-1_0.html#IDToken"},{"reference_url":"https://www.pac4j.org/4.5.x/docs/release-notes.html","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://www.pac4j.org/4.5.x/docs/release-notes.html"},{"reference_url":"https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-44878","reference_id":"CVE-2021-44878","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-44878"},{"reference_url":"https://github.com/advisories/GHSA-xhw6-hjc9-679m","reference_id":"GHSA-xhw6-hjc9-679m","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-xhw6-hjc9-679m"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/60072?format=json","purl":"pkg:maven/org.pac4j/pac4j-core@5.2.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-8bx1-jxeh-j7e6"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:maven/org.pac4j/pac4j-core@5.2.0"}],"aliases":["CVE-2021-44878","GHSA-xhw6-hjc9-679m"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-mcvx-6zuz-mkcy"}],"fixing_vulnerabilities":[],"risk_score":"4.0","resource_url":"http://public2.vulnerablecode.io/packages/pkg:maven/org.pac4j/pac4j-core@4.5.4"}