CVE-2026-2242— janet-lang janet specials.c janetc_if out-of-bounds
Quick assessment
Affected
janet-lang janet
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Janet是Janet Language开源的一种函数式和命令式编程语言和字节码解释器。 janet-lang janet 1.40.1及之前版本存在缓冲区错误漏洞，该漏洞源于函数janetc_if存在越界读取，可能导致信息泄露。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-2242
Vulnerability Information
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Vulnerability Title
janet-lang janet specials.c janetc_if out-of-bounds
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in janet-lang janet up to 1.40.1. This impacts the function janetc_if of the file src/core/specials.c. Executing a manipulation can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called c43e06672cd9dacf2122c99f362120a17c34b391. It is advisable to implement a patch to correct this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Janet 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Janet是Janet Language开源的一种函数式和命令式编程语言和字节码解释器。 janet-lang janet 1.40.1及之前版本存在缓冲区错误漏洞，该漏洞源于函数janetc_if存在越界读取，可能导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| janet-lang | janet | 1.40.0 | - |
|
II. Public POCs for CVE-2026-2242
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-2242 (1)
-
🔗 Submit #754495: janet-lang janet 2fabc80 Heap-based Buffer Overflow Read full article third-party-advisory
Same Patch Batch · janet-lang · 2026-02-09 · 3 CVEs total
| CVE-2026-2240 | 3.3 LOW | janet-lang janet compile.c janetc_pop_funcdef out-of-bounds |
| CVE-2026-2241 | 3.3 LOW | janet-lang janet os.c os_strftime out-of-bounds |
IV. Related Vulnerabilities
Same product: janet
-
CVE-2026-10268
janet-lang janet marsh.c unmarshal_one_fiber integer overflo -
CVE-2026-10267
janet-lang janet debug.c doframe out-of-bounds -
CVE-2026-2869
janet-lang janet handleattr specials.c janetc_varset out-of- -
CVE-2026-2241
janet-lang janet os.c os_strftime out-of-bounds -
CVE-2026-2240
janet-lang janet compile.c janetc_pop_funcdef out-of-bounds
Same vendor: janet-lang
-
CVE-2026-10268
janet-lang janet marsh.c unmarshal_one_fiber integer overflo -
CVE-2026-10267
janet-lang janet debug.c doframe out-of-bounds -
CVE-2026-2869
janet-lang janet handleattr specials.c janetc_varset out-of- -
CVE-2026-2241
janet-lang janet os.c os_strftime out-of-bounds -
CVE-2026-2240
janet-lang janet compile.c janetc_pop_funcdef out-of-bounds
Same weakness: CWE-125
-
CVE-2026-79843
HPE NonStop SQL/MX EXE - out-of-bounds read vulnerability -
CVE-2026-101290
CVE-2026-101290 -
CVE-2026-76667
HPE NonStop EXPAND - Out-of-Bounds memory read vulnerability -
CVE-2026-76666
HPE NonStop EXPAND - Out-of-Bounds memory read -
CVE-2026-76665
HPE NonStop EXPAND - Buffer Overflow vulnerability
V. Comments for CVE-2026-2242
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