{"cve":{"cve_id":"CVE-2026-34181","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":0.00196,"epss_percentile":0.09355,"epss_as_of":"2026-06-23","description":"Issue Summary: The PKCS#12 file processing fails to perform sufficient input\nvalidation for files that use Password-Based Message Authentication Code 1\n(PBMAC1) integrity mechanism allowing a certificate and private key forgery.\n\nImpact Summary: An attacker impersonating a user can cause a service reading\nPKCS#12 files to accept forged certificates and private keys with a 1 in 256\nprobability.\n\nIf a service accepting PKCS#12 files is using passwords for authenticating\nthe received files, the attacker can create unencrypted PKCS#12 files that\nuse PBMAC1 authentication that specifies an HMAC key of only one byte, allowing\nthem to craft a file that will be accepted with a 1 in 256 probability.\nThat would then cause the service to accept a certificate and private key\ncontrolled by the attacker.\n\nThe FIPS modules are not affected by this issue, as the affected code is\noutside the OpenSSL FIPS module boundary.","published_at":"2026-06-09T16:03:22.065000Z","last_modified_at":null,"cvss_v3_score":7.4,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-354"],"nvd_references":["https://openssl-library.org/news/secadv/20260609.txt","https://github.com/openssl/openssl/commit/0300eb9ddce7a0895bf301a4b0c03a9da2313a0f","https://github.com/openssl/openssl/commit/ec36f2417c4ddd8cabce4b4a60a3d7a7365f2d81","https://github.com/openssl/openssl/commit/85dcbb3abaa4878af5c8fbbe11bce708fcf984a7","https://github.com/openssl/openssl/commit/79eb76a937e474bb7610a0a3dc57131dc8dc6610"],"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":"2026-06-28T23:29:57.324527Z"},"effective_severity":"HIGH","badges":[],"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":"H","value_label":"High"},{"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":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"openssl","vendor_name":"OpenSSL","product_slug":"openssl","product_name":"OpenSSL","version_start":"4.0.0","version_start_inclusive":true,"version_end":"4.0.1","version_end_inclusive":false,"cpe23_uri":"cve5:openssl:openssl:4.0.0:4.0.1"},{"vendor_slug":"openssl","vendor_name":"OpenSSL","product_slug":"openssl","product_name":"OpenSSL","version_start":"3.6.0","version_start_inclusive":true,"version_end":"3.6.3","version_end_inclusive":false,"cpe23_uri":"cve5:openssl:openssl:3.6.0:3.6.3"},{"vendor_slug":"openssl","vendor_name":"OpenSSL","product_slug":"openssl","product_name":"OpenSSL","version_start":"3.5.0","version_start_inclusive":true,"version_end":"3.5.7","version_end_inclusive":false,"cpe23_uri":"cve5:openssl:openssl:3.5.0:3.5.7"},{"vendor_slug":"openssl","vendor_name":"OpenSSL","product_slug":"openssl","product_name":"OpenSSL","version_start":"3.4.0","version_start_inclusive":true,"version_end":"3.4.6","version_end_inclusive":false,"cpe23_uri":"cve5:openssl:openssl:3.4.0:3.4.6"}],"exploit_refs":[],"news":[],"references":[{"url":"https://openssl-library.org/news/secadv/20260609.txt","source_type":"MISC","tags":[]},{"url":"https://github.com/openssl/openssl/commit/0300eb9ddce7a0895bf301a4b0c03a9da2313a0f","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/openssl/openssl/commit/ec36f2417c4ddd8cabce4b4a60a3d7a7365f2d81","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/openssl/openssl/commit/85dcbb3abaa4878af5c8fbbe11bce708fcf984a7","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/openssl/openssl/commit/79eb76a937e474bb7610a0a3dc57131dc8dc6610","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-06-09T16:03:22.065000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:53:20.032350Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:20.032350Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:20.032350Z","label":"CVSS score revised","source":"cvelistv5"}]}