Vulnerability in Jsish

CVE-2025-65570

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…

EPSS: 0.004 (35.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

  • Jsish — versions 2.0
  • N/a — versions n/a

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-65570?
CVE-2025-65570 is a critical-severity vulnerability in Jsish, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 9.8/10. Published 2025-12-29.
How severe is CVE-2025-65570?
Critical severity. CVSS v3 base score is 9.8 out of 10.