{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-34183", "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "state": "PUBLISHED", "assignerShortName": "openssl", "dateReserved": "2026-03-26T09:29:36.013Z", "datePublished": "2026-06-09T16:03:23.623Z", "dateUpdated": "2026-06-09T16:03:23.623Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "OpenSSL", "vendor": "OpenSSL", "versions": [{"lessThan": "4.0.1", "status": "affected", "version": "4.0.0", "versionType": "semver"}, {"lessThan": "3.6.3", "status": "affected", "version": "3.6.0", "versionType": "semver"}, {"lessThan": "3.5.7", "status": "affected", "version": "3.5.0", "versionType": "semver"}, {"lessThan": "3.4.6", "status": "affected", "version": "3.4.0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "Abhinav Agarwal"}, {"lang": "en", "type": "remediation developer", "value": "Alexandr Nedvedicky"}], "datePublic": "2026-06-09T14:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Issue summary: Remote peer may exhaust heap memory of the QUIC<br>server or client by flooding it with packets containing PATH_CHALLENGE<br>frames.<br><br>Impact summary: A malicious remote peer can cause an unbounded<br>memory allocation which can lead to an abnormal termination of the<br>application acting as a QUIC client or server and a Denial of Service.<br><br>A remote peer may exhaust heap memory by flooding the local<br>QUIC stack with PATH_CHALLENGE frames. The local QUIC stack<br>allocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives.<br>The allocated PATH_RESPONSE frame gets freed only when the remote<br>peer acknowledges reception of the PATH_RESPONSE frame which will<br>not be done by a malicious peer.<br><br>The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by<br>this issue. The QUIC stack is outside of OpenSSL FIPS module<br>boundary."}], "value": "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."}], "metrics": [{"format": "other", "other": {"content": {"text": "Moderate"}, "type": "https://openssl-library.org/policies/general/security-policy/"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-1325", "description": "CWE-1325 Improperly Controlled Sequential Memory Allocation", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "shortName": "openssl", "dateUpdated": "2026-06-09T16:03:23.623Z"}, "references": [{"name": "OpenSSL Advisory", "tags": ["vendor-advisory"], "url": "https://openssl-library.org/news/secadv/20260609.txt"}, {"name": "4.0.1 git commit", "tags": ["patch"], "url": "https://github.com/openssl/security/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb"}, {"name": "3.6.3 git commit", "tags": ["patch"], "url": "https://github.com/openssl/security/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517"}, {"name": "3.5.7 git commit", "tags": ["patch"], "url": "https://github.com/openssl/security/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac"}, {"name": "3.4.6 git commit", "tags": ["patch"], "url": "https://github.com/openssl/security/commit/d2e9efbe4900a373227deb136e8665401404ffac"}], "source": {"discovery": "UNKNOWN"}, "title": "Unbounded Memory Growth in the QUIC PATH_CHALLENGE Handler", "x_generator": {"engine": "Vulnogram 0.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-34183", "lastModified": "2026-06-09T17:17:05.000", "metrics": {}, "published": "2026-06-09T17:17:05.000", "references": [{"source": "openssl-security@openssl.org", "url": "https://github.com/openssl/security/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517"}, {"source": "openssl-security@openssl.org", "url": "https://github.com/openssl/security/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac"}, {"source": "openssl-security@openssl.org", "url": "https://github.com/openssl/security/commit/d2e9efbe4900a373227deb136e8665401404ffac"}, {"source": "openssl-security@openssl.org", "url": "https://github.com/openssl/security/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb"}, {"source": "openssl-security@openssl.org", "url": "https://openssl-library.org/news/secadv/20260609.txt"}], "sourceIdentifier": "openssl-security@openssl.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1325"}], "source": "openssl-security@openssl.org", "type": "Secondary"}]}

{}

{"created": "2026-06-09T17:30:10.519709+00:00", "updated": "2026-06-09T17:30:10.519722+00:00", "vendors": []}