{"cve":{"cve_id":"CVE-2023-50269","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.57627,"epss_percentile":0.99008,"epss_as_of":"2026-08-26","description":"Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives.","published_at":"2023-12-14T17:09:25.168000Z","last_modified_at":null,"cvss_v3_score":8.6,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":true,"ssvc_technical_impact":"partial","cwes":["CWE-674"],"nvd_references":["https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3","http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch","http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/","https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html","https://security.netapp.com/advisory/ntap-20240119-0005/"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-29T01:41:37.767234Z"},"effective_severity":"HIGH","badges":["epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"squid-cache","vendor_name":"squid-cache","product_slug":"squid","product_name":"squid","version_start":">= 2.6, <= 2.7.STABLE9","version_start_inclusive":true,"version_end":">= 2.6, <= 2.7.STABLE9","version_end_inclusive":true,"cpe23_uri":"cve5:squid-cache:squid:>= 2.6, <= 2.7.STABLE9:>= 2.6, <= 2.7.STABLE9"},{"vendor_slug":"squid-cache","vendor_name":"squid-cache","product_slug":"squid","product_name":"squid","version_start":">= 3.1, <= 5.9","version_start_inclusive":true,"version_end":">= 3.1, <= 5.9","version_end_inclusive":true,"cpe23_uri":"cve5:squid-cache:squid:>= 3.1, <= 5.9:>= 3.1, <= 5.9"},{"vendor_slug":"squid-cache","vendor_name":"squid-cache","product_slug":"squid","product_name":"squid","version_start":">= 6.0.1, < 6.6","version_start_inclusive":true,"version_end":">= 6.0.1, < 6.6","version_end_inclusive":true,"cpe23_uri":"cve5:squid-cache:squid:>= 6.0.1, < 6.6:>= 6.0.1, < 6.6"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch","source_type":"MISC","tags":["patch"]},{"url":"http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch","source_type":"MISC","tags":["patch"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://security.netapp.com/advisory/ntap-20240119-0005/","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2023-12-14T17:09:25.168000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:30:54.274701Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:30:54.274701Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:30:54.274701Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T01:41:37.767234Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:41:37.767234Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:41:37.767234Z","label":"SSVC decision revised","source":"vulnrichment"}]}