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.
CVSS Score
9.8
EPSS Score
0.005
Published
2025-12-29
An issue found in Jsish v.3.0.11 and before allows an attacker to cause a denial of service via the Jsi_Strlen function in the src/jsiChar.c file.
CVSS Score
7.5
EPSS Score
0.008
Published
2023-04-04
An issue found in Jsish v.3.0.11 and before allows an attacker to cause a denial of service via the StringReplaceCmd function in the src/jsiChar.c file.
CVSS Score
7.5
EPSS Score
0.008
Published
2023-04-04
Buffer overflow vulnerability in function NumberToPrecisionCmd in jsish before 3.0.7, allows remote attackers to execute arbitrary code.
CVSS Score
9.8
EPSS Score
0.023
Published
2021-07-13
Integer overflow vulnerability in function Jsi_ObjArraySizer in jsish before 3.0.8, allows remote attackers to execute arbitrary code.
CVSS Score
9.8
EPSS Score
0.033
Published
2021-07-13
Integer overflow vulnerability in function Jsi_ObjSetLength in jsish before 3.0.6, allows remote attackers to execute arbitrary code.
CVSS Score
9.8
EPSS Score
0.033
Published
2021-07-13
Stack overflow vulnerability in function jsi_evalcode_sub in jsish before 3.0.18, allows remote attackers to cause a Denial of Service via a crafted value to the execute parameter.
CVSS Score
7.5
EPSS Score
0.016
Published
2021-07-13