{"cve":{"cve_id":"CVE-2026-34183","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":0.00511,"epss_percentile":0.39478,"epss_as_of":"2026-06-23","description":"Issue summary: Remote peer may exhaust heap memory of the QUIC\nserver or client by flooding it with packets containing PATH_CHALLENGE\nframes.\n\nImpact summary: A malicious remote peer can cause an unbounded\nmemory allocation which can lead to an abnormal termination of the\napplication acting as a QUIC client or server and a Denial of Service.\n\nA remote peer may exhaust heap memory by flooding the local\nQUIC stack with PATH_CHALLENGE frames. The local QUIC stack\nallocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives.\nThe allocated PATH_RESPONSE frame gets freed only when the remote\npeer acknowledges reception of the PATH_RESPONSE frame which will\nnot be done by a malicious peer.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by\nthis issue. The QUIC stack is outside of OpenSSL FIPS module\nboundary.","published_at":"2026-06-09T16:03:23.623000Z","last_modified_at":null,"cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-1325"],"nvd_references":["https://openssl-library.org/news/secadv/20260609.txt","https://github.com/openssl/openssl/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb","https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517","https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac","https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffac"],"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":"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":"U","value_label":"Unchanged"},{"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":"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/fbaa83859c01ad64f497b757aaf51be7d05ed9eb","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffac","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-06-09T16:03:23.623000Z","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"}]}