Out-of-Bounds Read Vulnerability in Tencent RapidJSON Library Affecting Regex Parser
CVE-2026-116620

6.9MEDIUM

Key Information:

Vendor

Tencent

Status
Rapidjson
Vendor
CVE Published:
27 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-116620?

A vulnerability exists in the Tencent RapidJSON library, specifically within the Regex Parser component, where the GenericStringStream<UTF8>::Take function in include/rapidjson/stream.h is susceptible to out-of-bounds read operations. This flaw can be remotely exploited, posing a significant security risk. Despite early notification from the community, Tencent has yet to respond or provide a patch, leaving affected versions exposed to potential attacks.

Affected Version(s)

RapidJSON 1.0

RapidJSON 1.1.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-116620 - Proof of Concept

References

https://vuldb.com/vuln/426552
vdb-entrytechnical-description
https://vuldb.com/vuln/426552/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-116620
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

shuidajiao (VulDB User)
VulDB CNA Team
.