{"id":"CVE-2026-82209","summary":"domain-scoped PSL domain cookie","details":"When libpsl support is enabled, libcurl fails to enforce the Public Suffix\nList boundary check when processing a `Set-Cookie` header where the `Domain`\nattribute explicitly matches an origin host that is itself a public suffix\n(e.g., `Domain=co.uk` set by `co.uk`).\n\nInstead of coercing it into a strict host-only cookie, libcurl saves the\ncookie with wildcard domain scope (`.co.uk`). Consequently, the cookie is\ninappropriately included in subsequent outbound requests or HTTP redirects to\narbitrary sibling subdomains under the same public suffix (e.g.,\n`attacker.co.uk`).","aliases":["CURL-CVE-2026-82209"],"modified":"2026-09-18T03:33:29.954419650Z","published":"2026-09-06T17:49:35.050Z","related":["openSUSE-SU-2026:11696-1"],"database_specific":{"cwe_ids":["CWE-201"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82209.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"7.46.0"},{"fixed":"8.14.2"},{"introduced":"8.15.0"},{"fixed":"8.16.1"},{"introduced":"8.17.0"},{"fixed":"8.20.1"},{"introduced":"e77b5b7453c1e8ccd7ec0816890d98e2f392e465"},{"fixed":"95c1e8915dce64606bd753fd47fc0bd236e31cd6"}]}],"cna_assigner":"curl"},"references":[{"type":"WEB","url":"https://curl.se/docs/CVE-2026-82209.html"},{"type":"WEB","url":"https://curl.se/docs/CVE-2026-82209.json"},{"type":"WEB","url":"https://hackerone.com/reports/3972385"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82209.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82209"},{"type":"PACKAGE","url":"https://github.com/curl/curl.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/curl/curl","events":[{"introduced":"e2ae32ff5f3ab6f0819590f61f248f17df12987f"},{"fixed":"01346829096c61b372692f6dc43ffa778c6caccd"}],"database_specific":{"extracted_events":[{"introduced":"7.46.0"},{"fixed":"8.22.0"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*"}}],"versions":["7.46.0","7.47.0","7.47.1","7.48.0","7.49.0","7.49.1","7.50.0","7.50.1","7.50.2","7.50.3","7.51.0","7.52.0","7.52.1","7.53.0","7.53.1","7.54.0","7.54.1","7.55.0","7.55.1","7.56.0","7.56.1","7.57.0","7.58.0","7.59.0","7.60.0","7.61.0","7.61.1","7.62.0","7.63.0","7.64.0","7.64.1","7.65.0","7.65.1","7.65.2","7.65.3","7.66.0","7.67.0","7.68.0","7.69.0","7.69.1","7.70.0","7.71.0","7.71.1","7.72.0","7.73.0","7.74.0","7.75.0","7.76.0","7.76.1","7.77.0","7.78.0","7.79.0","7.79.1","7.80.0","7.81.0","7.82.0","7.83.0","7.83.1","7.84.0","7.85.0","7.86.0","7.87.0","7.88.0","7.88.1","8.0.0","8.0.1","8.1.0","8.1.1","8.1.2","8.10.0","8.10.1","8.11.0","8.11.1","8.12.0","8.12.1","8.13.0","8.14.0","8.14.1","8.15.0","8.16.0","8.17.0","8.18.0","8.19.0","8.2.0","8.2.1","8.20.0","8.3.0","8.4.0","8.5.0","8.6.0","8.7.0","8.7.1","8.8.0","8.9.0","8.9.1","rc-8_22_0-3","rc-8_22_0-2","rc-8_22_0-1","curl-8_21_0","rc-8_21_0-3","rc-8_21_0-2","rc-8_21_0-1","curl-8_20_0","rc-8_20_0-3","rc-8_20_0-2","rc-8_20_0-1","curl-8_19_0","curl-8_18_0","curl-8_17_0","curl-8_16_0","curl-8_15_0","curl-8_14_1","curl-8_14_0","curl-8_13_0","curl-8_12_1","curl-8_12_0","curl-8_11_1","curl-8_11_0","curl-8_10_1","curl-8_10_0","curl-8_9_1","curl-8_9_0","curl-8_8_0","curl-8_7_1","curl-8_7_0","curl-8_6_0","curl-8_5_0","curl-8_4_0","curl-8_3_0","curl-8_2_1","curl-8_2_0","curl-8_1_2","curl-8_1_1","curl-8_1_0","curl-8_0_1","curl-8_0_0","curl-7_88_1","curl-7_88_0","curl-7_87_0","curl-7_86_0","curl-7_85_0","curl-7_84_0","curl-7_83_1","curl-7_83_0","curl-7_82_0","curl-7_81_0","curl-7_80_0","curl-7_79_1","curl-7_79_0","curl-7_78_0","curl-7_77_0","curl-7_76_1","curl-7_76_0","curl-7_75_0","curl-7_74_0","curl-7_73_0","curl-7_72_0","curl-7_71_1","curl-7_71_0","curl-7_70_0","curl-7_69_1","curl-7_69_0","curl-7_68_0","curl-7_67_0","curl-7_66_0","curl-7_65_3","curl-7_65_2","curl-7_65_1","curl-7_65_0","curl-7_64_1","curl-7_64_0","curl-7_63_0","curl-7_62_0","curl-7_61_1","curl-7_61_0","curl-7_60_0","curl-7_59_0","curl-7_58_0","curl-7_57_0","curl-7_56_1","curl-7_56_0","curl-7_55_1","curl-7_55_0","curl-7_54_1","curl-7_54_0","curl-7_53_1","curl-7_53_0","curl-7_52_1","curl-7_52_0","curl-7_51_0","curl-7_50_3","curl-7_50_2","curl-7_50_1","curl-7_50_0","curl-7_49_1","curl-7_49_0","curl-7_48_0","curl-7_47_1","curl-7_47_0","curl-7_46_0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-82209.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N"}]}