{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63626", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-17T14:11:15.481Z", "datePublished": "2026-10-14T18:26:16.830Z", "dateUpdated": "2026-10-14T18:26:16.830Z"}, "containers": {"cna": {"title": "Mongoose: ppp_handle_ipv6cp() uses attacker-controlled length without bounds check \u2014 OOB read and heap overflow (PPP/PPPoE, MG_ENABLE_IPV6)", "problemTypes": [{"descriptions": [{"cweId": "CWE-122", "lang": "en", "description": "CWE-122: Heap-based Buffer Overflow", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/cesanta/mongoose/security/advisories/GHSA-pc66-j6r6-49x9", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/cesanta/mongoose/security/advisories/GHSA-pc66-j6r6-49x9"}, {"name": "https://github.com/cesanta/mongoose/commit/751f14742dea934bec08a507ab1fecc3673d4903", "tags": ["x_refsource_MISC"], "url": "https://github.com/cesanta/mongoose/commit/751f14742dea934bec08a507ab1fecc3673d4903"}, {"name": "https://github.com/cesanta/mongoose/releases/tag/7.23", "tags": ["x_refsource_MISC"], "url": "https://github.com/cesanta/mongoose/releases/tag/7.23"}], "affected": [{"vendor": "cesanta", "product": "mongoose", "versions": [{"version": "< 7.23", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-14T18:26:16.830Z"}, "descriptions": [{"lang": "en", "value": "Mongoose is an embedded web server and network library. Prior to 7.23, ppp_handle_ipv6cp() in src/l2_ppp.c trusts the 16-bit IPv6CP len field without checking it against the received payload size. On a PPP or PPPoE link using MG_ENABLE_TCPIP and MG_ENABLE_IPV6, an unauthenticated adjacent peer can complete the required LCP exchange and send a short Configure-Request with an oversized length, causing ppp_tx_frame() to read beyond recv_queue.buf and write beyond tx.buf. The same length misuse can also expose adjacent heap bytes in a reply or hang the event loop through find_opt(). This issue is fixed in version 7.23."}], "source": {"advisory": "GHSA-pc66-j6r6-49x9", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "mongoose", "vendor": "cesanta", "versions": [{"status": "affected", "version": "< 7.23"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Mongoose is an embedded web server and network library. Prior to 7.23, ppp_handle_ipv6cp() in src/l2_ppp.c trusts the 16-bit IPv6CP len field without checking it against the received payload size. On a PPP or PPPoE link using MG_ENABLE_TCPIP and MG_ENABLE_IPV6, an unauthenticated adjacent peer can complete the required LCP exchange and send a short Configure-Request with an oversized length, causing ppp_tx_frame() to read beyond recv_queue.buf and write beyond tx.buf. The same length misuse can also expose adjacent heap bytes in a reply or hang the event loop through find_opt(). This issue is fixed in version 7.23."}], "id": "CVE-2026-63626", "lastModified": "2026-10-14T19:17:18.570", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-14T19:17:18.570", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/cesanta/mongoose/commit/751f14742dea934bec08a507ab1fecc3673d4903"}, {"source": "security-advisories@github.com", "url": "https://github.com/cesanta/mongoose/releases/tag/7.23"}, {"source": "security-advisories@github.com", "url": "https://github.com/cesanta/mongoose/security/advisories/GHSA-pc66-j6r6-49x9"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}, {"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}