{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-59956", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2025-09-23T14:33:49.506Z", "datePublished": "2025-09-29T23:57:08.133Z", "dateUpdated": "2025-09-30T14:14:53.214Z"}, "containers": {"cna": {"title": "AgentAPI exposed user chat history via a DNS rebinding attack", "problemTypes": [{"descriptions": [{"cweId": "CWE-350", "lang": "en", "description": "CWE-350: Reliance on Reverse DNS Resolution for a Security-Critical Action", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/coder/agentapi/security/advisories/GHSA-w64r-2g3w-w8w4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/coder/agentapi/security/advisories/GHSA-w64r-2g3w-w8w4"}, {"name": "https://github.com/coder/agentapi/pull/49", "tags": ["x_refsource_MISC"], "url": "https://github.com/coder/agentapi/pull/49"}, {"name": "https://github.com/coder/agentapi/commit/5c425c62447b8a9eac19e9fc5a2eae7f0803f149", "tags": ["x_refsource_MISC"], "url": "https://github.com/coder/agentapi/commit/5c425c62447b8a9eac19e9fc5a2eae7f0803f149"}, {"name": "https://github.blog/security/application-security/localhost-dangers-cors-and-dns-rebinding", "tags": ["x_refsource_MISC"], "url": "https://github.blog/security/application-security/localhost-dangers-cors-and-dns-rebinding"}, {"name": "https://github.com/coder/agentapi/releases/tag/v0.4.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/coder/agentapi/releases/tag/v0.4.0"}, {"name": "https://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltration", "tags": ["x_refsource_MISC"], "url": "https://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltration"}], "affected": [{"vendor": "coder", "product": "agentapi", "versions": [{"version": "< 0.4.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2025-09-29T23:57:08.133Z"}, "descriptions": [{"lang": "en", "value": "AgentAPI is an HTTP API for Claude Code, Goose, Aider, Gemini, Amp, and Codex. Versions 0.3.3 and below are susceptible to a client-side DNS rebinding attack when hosted over plain HTTP on localhost. An attacker can gain access to the /messages endpoint served by the Agent API. This allows for the unauthorized exfiltration of sensitive user data, specifically local message history, which can include secret keys, file system contents, and intellectual property the user was working on locally. This issue is fixed in version 0.4.0."}], "source": {"advisory": "GHSA-w64r-2g3w-w8w4", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltration/", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-09-30T14:14:39.407205Z", "id": "CVE-2025-59956", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-09-30T14:14:53.214Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-59956", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-09-30T14:14:39.407205Z"}}}], "references": [{"url": "https://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltration/", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-09-30T14:14:47.754Z"}}], "cna": {"title": "AgentAPI exposed user chat history via a DNS rebinding attack", "source": {"advisory": "GHSA-w64r-2g3w-w8w4", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}], "affected": [{"vendor": "coder", "product": "agentapi", "versions": [{"status": "affected", "version": "< 0.4.0"}]}], "references": [{"url": "https://github.com/coder/agentapi/security/advisories/GHSA-w64r-2g3w-w8w4", "name": "https://github.com/coder/agentapi/security/advisories/GHSA-w64r-2g3w-w8w4", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/coder/agentapi/pull/49", "name": "https://github.com/coder/agentapi/pull/49", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/coder/agentapi/commit/5c425c62447b8a9eac19e9fc5a2eae7f0803f149", "name": "https://github.com/coder/agentapi/commit/5c425c62447b8a9eac19e9fc5a2eae7f0803f149", "tags": ["x_refsource_MISC"]}, {"url": "https://github.blog/security/application-security/localhost-dangers-cors-and-dns-rebinding", "name": "https://github.blog/security/application-security/localhost-dangers-cors-and-dns-rebinding", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/coder/agentapi/releases/tag/v0.4.0", "name": "https://github.com/coder/agentapi/releases/tag/v0.4.0", "tags": ["x_refsource_MISC"]}, {"url": "https://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltration", "name": "https://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltration", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "AgentAPI is an HTTP API for Claude Code, Goose, Aider, Gemini, Amp, and Codex. Versions 0.3.3 and below are susceptible to a client-side DNS rebinding attack when hosted over plain HTTP on localhost. An attacker can gain access to the /messages endpoint served by the Agent API. This allows for the unauthorized exfiltration of sensitive user data, specifically local message history, which can include secret keys, file system contents, and intellectual property the user was working on locally. This issue is fixed in version 0.4.0."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-350", "description": "CWE-350: Reliance on Reverse DNS Resolution for a Security-Critical Action"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2025-09-29T23:57:08.133Z"}}}, "cveMetadata": {"cveId": "CVE-2025-59956", "state": "PUBLISHED", "dateUpdated": "2025-09-30T14:14:53.214Z", "dateReserved": "2025-09-23T14:33:49.506Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2025-09-29T23:57:08.133Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:coder:agentapi:*:*:*:*:*:*:*:*", "matchCriteriaId": "F3165133-ABFF-4079-B96D-48E4AB608DAC", "versionEndExcluding": "0.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "AgentAPI is an HTTP API for Claude Code, Goose, Aider, Gemini, Amp, and Codex. Versions 0.3.3 and below are susceptible to a client-side DNS rebinding attack when hosted over plain HTTP on localhost. An attacker can gain access to the /messages endpoint served by the Agent API. This allows for the unauthorized exfiltration of sensitive user data, specifically local message history, which can include secret keys, file system contents, and intellectual property the user was working on locally. This issue is fixed in version 0.4.0."}], "id": "CVE-2025-59956", "lastModified": "2025-10-08T15:05:53.100", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2025-09-30T11:37:41.743", "references": [{"source": "security-advisories@github.com", "tags": ["Technical Description"], "url": "https://github.blog/security/application-security/localhost-dangers-cors-and-dns-rebinding"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/coder/agentapi/commit/5c425c62447b8a9eac19e9fc5a2eae7f0803f149"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/coder/agentapi/pull/49"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/coder/agentapi/releases/tag/v0.4.0"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/coder/agentapi/security/advisories/GHSA-w64r-2g3w-w8w4"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltration"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"], "url": "https://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltration/"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-350"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-290"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"created": "2025-09-30T08:47:29.048839+00:00", "updated": "2025-09-30T08:47:29.048926+00:00", "vendors": ["coder", "coder$PRODUCT$agentapi"]}