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Vulnerability record · CVE-2021-46482 · published 25 January 2022

CVE-2021-46482: Jsish out-of-bounds write vulnerability

Jsish · Jsish

Jsish v3.5.0 was discovered to contain a heap buffer overflow via NumberConstructor at src/jsiNumber.c.

7.8 CVSS 3.1 High EPSS 0.84% · top 43.8% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score, v2 6.8
0.84%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Jsish v3.5.0 was discovered to contain a heap buffer overflow via NumberConstructor at src/jsiNumber.c.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/pcmacdon/jsish/issues/66 ExploitPatchThird Party Advisory
https://github.com/pcmacdon/jsish/issues/66 ExploitPatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-65570Jsish type confusion vulnerabilityA type confusion in jsish 2.0 allows incorrect control flow during execution of the OP_NEXT opcode. When an “instanceof” expression uses an array ele…EPSS 0.53%9.8CVE-2024-24186Jsish out-of-bounds write vulnerabilityJsish v3.5.0 (commit 42c694c) was discovered to contain a stack-overflow via the component IterGetKeysCallback at /jsish/src/jsiValue.c.EPSS 0.88%9.8CVE-2024-24188Jsish out-of-bounds write vulnerabilityJsish v3.5.0 was discovered to contain a heap-buffer-overflow in ./src/jsiUtils.c.EPSS 0.80%9.8CVE-2024-24189Jsish use after free vulnerabilityJsish v3.5.0 (commit 42c694c) was discovered to contain a use-after-free via the SplitChar at ./src/jsiUtils.c.EPSS 0.69%9.8CVE-2020-22873Jsish classic buffer overflow vulnerabilityBuffer overflow vulnerability in function NumberToPrecisionCmd in jsish before 3.0.7, allows remote attackers to execute arbitrary code.EPSS 2.3%9.8CVE-2020-22874Jsish integer overflow vulnerabilityInteger overflow vulnerability in function Jsi_ObjArraySizer in jsish before 3.0.8, allows remote attackers to execute arbitrary code.EPSS 3.3%9.8CVE-2020-22875Jsish integer overflow vulnerabilityInteger overflow vulnerability in function Jsi_ObjSetLength in jsish before 3.0.6, allows remote attackers to execute arbitrary code.EPSS 3.3%9.8CVE-2019-1010177Jsish use after free vulnerabilityJsish 2.4.70 2.047 is affected by: Use After Free. The impact is: denial of service and possibly arbitrary code execution. The component is: function…EPSS 2.1%

Source: NIST National Vulnerability Database (record CVE-2021-46482), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.