CVEvulnerability
CVE-2025-65570
9.8 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2025-12-29
- Last modified
- 2026-10-13
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-843
Description
A type confusion in jsish 2.0 allows incorrect control flow during execution of the OP_NEXT opcode. When an “instanceof” expression uses an array element access as the left-hand operand inside a for-in loop, the instructions implementation leaves an additional array reference on the stack rather than consuming it during OP_INSTANCEOF. As a result, OP_NEXT interprets the array as an iterator object and reads the iterCmd function pointer from an invalid structure, potentially causing a crash or enabling code execution depending on heap layout.
Affected configurations
• jsish jsish 2.0
Related
Weakness · CWE (1)
- CWE-843 Access of Resource Using Incompatible Type weakness
References
- https://blog.mcsky.ro/writeups/2025/11/15/inline8-writeup.html Exploit, Third Party Advisory
- https://blog.mcsky.ro/writeups/2025/11/15/inline8-writeup.html Exploit, Third Party Advisory