{"api_version":"1","generated_at":"2026-04-30T12:35:55+00:00","cve":"CVE-2026-4965","urls":{"html":"https://cve.report/CVE-2026-4965","api":"https://cve.report/api/cve/CVE-2026-4965.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-4965","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-4965"},"summary":{"title":"letta-ai letta Incomplete Fix CVE-2025-6101 ast_parsers.py resolve_type eval injection","description":"A vulnerability was detected in letta-ai letta 0.16.4. This issue affects the function resolve_type of the file letta/functions/ast_parsers.py of the component Incomplete Fix CVE-2025-6101. Performing a manipulation results in improper neutralization of directives in dynamically evaluated code. The attack can be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.","state":"PUBLISHED","assigner":"VulDB","published_at":"2026-03-27 18:16:06","updated_at":"2026-04-29 22:07:31"},"problem_types":["CWE-94","CWE-95","CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code","CWE-94 Code Injection"],"metrics":[{"version":"4.0","source":"cna@vuldb.com","type":"Secondary","score":"5.5","severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","data":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"PROOF_OF_CONCEPT","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}},{"version":"4.0","source":"CNA","type":"DECLARED","score":"6.9","severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","data":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"}},{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"9.8","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"cna@vuldb.com","type":"Secondary","score":"7.3","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","baseScore":7.3,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"LOW"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.3","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","data":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.1"}},{"version":"3.0","source":"CNA","type":"DECLARED","score":"7.3","severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","data":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.0"}},{"version":"2.0","source":"cna@vuldb.com","type":"Secondary","score":"7.5","severity":"","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","data":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"}},{"version":"2.0","source":"CNA","type":"DECLARED","score":"7.5","severity":"","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR","data":{"baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR","version":"2.0"}}],"references":[{"url":"https://vuldb.com/?ctiid.353842","name":"https://vuldb.com/?ctiid.353842","refsource":"cna@vuldb.com","tags":["Permissions Required","VDB Entry"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://vuldb.com/?id.353842","name":"https://vuldb.com/?id.353842","refsource":"cna@vuldb.com","tags":["Third Party Advisory","VDB Entry"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://gist.github.com/YLChen-007/fc09bc447a73bba526c1642d9ce73ca5","name":"https://gist.github.com/YLChen-007/fc09bc447a73bba526c1642d9ce73ca5","refsource":"cna@vuldb.com","tags":["Exploit","Third Party Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://vuldb.com/?submit.777654","name":"https://vuldb.com/?submit.777654","refsource":"cna@vuldb.com","tags":["Exploit","Third Party Advisory","VDB Entry"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-4965","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4965","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"letta-ai","product":"letta","version":"affected 0.16.4","platforms":[]}],"timeline":[{"source":"CNA","time":"2026-03-27T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"source":"CNA","time":"2026-03-27T01:00:00.000Z","lang":"en","value":"VulDB entry created"},{"source":"CNA","time":"2026-03-27T09:30:55.000Z","lang":"en","value":"VulDB entry last update"}],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"Eric-z (VulDB User)","lang":"en"},{"source":"CNA","value":"VulDB","lang":"en"}],"nvd_cpes":[{"cve_year":"2026","cve_id":"4965","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"letta","cpe5":"letta","cpe6":"0.16.4","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"4965","cve":"CVE-2026-4965","epss":"0.000200000","percentile":"0.055720000","score_date":"2026-04-29","updated_at":"2026-04-30 00:13:20"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-4965","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-03-27T18:43:36.207961Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-03-27T19:57:06.561Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"cpes":["cpe:2.3:a:letta:letta:*:*:*:*:*:*:*:*"],"modules":["Incomplete Fix CVE-2025-6101"],"product":"letta","vendor":"letta-ai","versions":[{"status":"affected","version":"0.16.4"}]}],"credits":[{"lang":"en","type":"reporter","value":"Eric-z (VulDB User)"},{"lang":"en","type":"coordinator","value":"VulDB"}],"descriptions":[{"lang":"en","value":"A vulnerability was detected in letta-ai letta 0.16.4. This issue affects the function resolve_type of the file letta/functions/ast_parsers.py of the component Incomplete Fix CVE-2025-6101. Performing a manipulation results in improper neutralization of directives in dynamically evaluated code. The attack can be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way."}],"metrics":[{"cvssV4_0":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"}},{"cvssV3_1":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.1"}},{"cvssV3_0":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.0"}},{"cvssV2_0":{"baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR","version":"2.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-95","description":"Improper Neutralization of Directives in Dynamically Evaluated Code","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-94","description":"Code Injection","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-03-27T22:07:55.514Z","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","shortName":"VulDB"},"references":[{"name":"VDB-353842 | letta-ai letta Incomplete Fix CVE-2025-6101 ast_parsers.py resolve_type eval injection","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/?id.353842"},{"name":"VDB-353842 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/?ctiid.353842"},{"name":"Submit #777654 | letta-ai letta 0.16.4 CWE-95","tags":["third-party-advisory"],"url":"https://vuldb.com/?submit.777654"},{"tags":["exploit"],"url":"https://gist.github.com/YLChen-007/fc09bc447a73bba526c1642d9ce73ca5"}],"timeline":[{"lang":"en","time":"2026-03-27T00:00:00.000Z","value":"Advisory disclosed"},{"lang":"en","time":"2026-03-27T01:00:00.000Z","value":"VulDB entry created"},{"lang":"en","time":"2026-03-27T09:30:55.000Z","value":"VulDB entry last update"}],"title":"letta-ai letta Incomplete Fix CVE-2025-6101 ast_parsers.py resolve_type eval injection"}},"cveMetadata":{"assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","assignerShortName":"VulDB","cveId":"CVE-2026-4965","datePublished":"2026-03-27T17:41:46.743Z","dateReserved":"2026-03-27T08:23:13.784Z","dateUpdated":"2026-03-27T22:07:55.514Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-03-27 18:16:06","lastModifiedDate":"2026-04-29 22:07:31","problem_types":["CWE-94","CWE-95","CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code","CWE-94 Code Injection"],"metrics":{"cvssMetricV40":[{"source":"cna@vuldb.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"PROOF_OF_CONCEPT","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"cna@vuldb.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","baseScore":7.3,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":3.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}],"cvssMetricV2":[{"source":"cna@vuldb.com","type":"Secondary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"HIGH","exploitabilityScore":10,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:letta:letta:0.16.4:*:*:*:*:*:*:*","matchCriteriaId":"5A2B32A6-7BA2-4877-9E05-F7E15BDEF433"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"4965","Ordinal":"1","Title":"letta-ai letta Incomplete Fix CVE-2025-6101 ast_parsers.py resol","CVE":"CVE-2026-4965","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"4965","Ordinal":"1","NoteData":"A vulnerability was detected in letta-ai letta 0.16.4. This issue affects the function resolve_type of the file letta/functions/ast_parsers.py of the component Incomplete Fix CVE-2025-6101. Performing a manipulation results in improper neutralization of directives in dynamically evaluated code. The attack can be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.","Type":"Description","Title":"letta-ai letta Incomplete Fix CVE-2025-6101 ast_parsers.py resol"}]}}}