{"vulnerability": "cve-2026-12866", "sightings": [{"uuid": "aff63590-45e4-4f0d-8e6b-25b8890c63fb", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "cve-2026-12866", "type": "seen", "source": "https://infosec.exchange/users/offseq/statuses/116797893970275740", "content": "CVE-2026-12866 | CRITICAL severity in expr-eval (all versions): Arbitrary code execution via toJSFunction() API. No patch yet \u2014 avoid untrusted input. Risk: full app compromise. Details: https://radar.offseq.com/threat/cve-2026-12866-code-execution-in-expr-eval-90f740bedba0af48 #OffSeq #infosec #security #CVE202612866", "creation_timestamp": "2026-06-23T06:00:34.675186Z"}, {"uuid": "b2eebc8c-071b-4a0e-b4f7-6ac89628c017", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "cve-2026-12866", "type": "seen", "source": "https://bsky.app/profile/offseq.bsky.social/post/3mowpwxfz6z2b", "content": "expr-eval (all versions) hit by CRITICAL RCE (CVE-2026-12866): attackers can run arbitrary JS via toJSFunction(). No patch \u2014 avoid untrusted input now. https://radar.offseq.com/threat/cve-2026-12866-code-execution-in-expr-eval-90f740bedba0af48 #OffSeq #vulnerability #AppSec", "creation_timestamp": "2026-06-23T06:00:56.740747Z"}, {"uuid": "332bec17-243b-4fb7-af21-0a1ac1aa8788", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-12866", "type": "seen", "source": "https://bsky.app/profile/cve.skyfleet.blue/post/3mowwi44peq2y", "content": "CVE-2026-12866 - expr-eval Code Execution via toJSFunction\nCVE ID : CVE-2026-12866\n \n Published : June 23, 2026, 5 a.m. | 2\u00a0hours, 44\u00a0minutes ago\n \n Description : All versions of the package expr-eval are vulnerable to Code Execution via the toJSFunction() API. An attacker can...", "creation_timestamp": "2026-06-23T07:57:27.275121Z"}]}