CVE-2023-36109

CRITICAL

JerryScript 3.0 - Buffer Overflow via ecma_stringbuilder_append_raw

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2023-36109. PoCs published by Limesss.

AI-analyzed exploit summary This PoC demonstrates a buffer overflow vulnerability in JerryScript's `ecma_stringbuilder_append_raw` function. The exploit manipulates a RegExp object's `exec` method to trigger the overflow during string replacement operations.

Description

Buffer Overflow vulnerability in JerryScript version 3.0, allows remote attackers to execute arbitrary code via ecma_stringbuilder_append_raw component at /jerry-core/ecma/base/ecma-helpers-string.c.

Exploits (1)

nomisec WORKING POC 2 stars
by Limesss · poc
https://github.com/Limesss/CVE-2023-36109

This PoC demonstrates a buffer overflow vulnerability in JerryScript's `ecma_stringbuilder_append_raw` function. The exploit manipulates a RegExp object's `exec` method to trigger the overflow during string replacement operations.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: JerryScript (version not specified, but likely affects multiple versions)
No auth needed
Prerequisites: JerryScript built with specific compile flags as described in the README
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 9.8
EPSS 0.0198
EPSS Percentile 77.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-120
Status published
Products (1)
jerryscript/jerryscript 3.0
Published Sep 20, 2023
Tracked Since Feb 18, 2026