{"id":"CVE-2026-42077","aliases":["GHSA-2cjr-5v3h-v2w4"],"url":"https://o3.security/vulnerability/CVE-2026-42077","summary":"Evolver: Prototype Pollution via `Object.assign()` in mailbox store operations","details":"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.","published":"2026-05-04T16:50:15.167Z","modified":"2026-08-07T11:51:05.748234026Z","cvss":{"score":5.2,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@evomap/evolver","fixedVersion":"1.69.3"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/EvoMap/evolver/releases/tag/v1.69.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42077.json"},{"type":"ADVISORY","url":"https://github.com/EvoMap/evolver/security/advisories/GHSA-2cjr-5v3h-v2w4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42077"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:05.748234026Z"}}