{"id":"CVE-2026-42077","state":"PUBLISHED","title":"Evolver: Prototype Pollution via `Object.assign()` in mailbox store operations","description":"Evolver is a GEP-powered self-evolving engine for AI agents. Prior to version 1.69.3, a prototype pollution vulnerability in the mailbox store module allows attackers to modify the behavior of all JavaScript objects by injecting malicious properties into Object.prototype. The vulnerability exists in the _applyUpdate() and _updateRecord() functions which use Object.assign() to merge user-controlled data without filtering dangerous keys like __proto__, constructor, or prototype. This issue has been patched in version 1.69.3.","publishedAt":"2026-05-04T16:50:15.167Z","updatedAt":"2026-05-06T13:40:54.808Z","severity":{"score":5.2,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["EvoMap evolver"],"affected":[{"vendor":"EvoMap","product":"evolver","versions":[{"version":"< 1.69.3","status":"affected"}]}],"references":["https://github.com/EvoMap/evolver/security/advisories/GHSA-2cjr-5v3h-v2w4","https://github.com/EvoMap/evolver/releases/tag/v1.69.3"],"weaknesses":["CWE-1321"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/42xxx/CVE-2026-42077.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42077","state":"PUBLISHED","datePublished":"2026-05-04T16:50:15.167Z","dateUpdated":"2026-05-06T13:40:54.808Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-23T19:17:30.565Z"},"containers":{"cna":{"title":"Evolver: Prototype Pollution via `Object.assign()` in mailbox store operations","descriptions":[{"lang":"en","value":"Evolver is a GEP-powered self-evolving engine for AI agents. Prior to version 1.69.3, a prototype pollution vulnerability in the mailbox store module allows attackers to modify the behavior of all JavaScript objects by injecting malicious properties into Object.prototype. The vulnerability exists in the _applyUpdate() and _updateRecord() functions which use Object.assign() to merge user-controlled data without filtering dangerous keys like __proto__, constructor, or prototype. This issue has been patched in version 1.69.3."}],"affected":[{"vendor":"EvoMap","product":"evolver","versions":[{"version":"< 1.69.3","status":"affected"}]}],"references":[{"url":"https://github.com/EvoMap/evolver/security/advisories/GHSA-2cjr-5v3h-v2w4","name":"https://github.com/EvoMap/evolver/security/advisories/GHSA-2cjr-5v3h-v2w4","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/EvoMap/evolver/releases/tag/v1.69.3","name":"https://github.com/EvoMap/evolver/releases/tag/v1.69.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.2,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1321","lang":"en","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-04T16:50:15.167Z"},"source":{"advisory":"GHSA-2cjr-5v3h-v2w4","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/EvoMap/evolver/security/advisories/GHSA-2cjr-5v3h-v2w4","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-06T13:40:45.787015Z","id":"CVE-2026-42077","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-06T13:40:54.808Z"}}]}}}