Heap-based Buffer Overflow in seladb PcapPlusPlus TLS Hello Handler
CVE-2026-13588

6.3MEDIUM

Key Information:

Vendor

Seladb

Status
Pcapplusplus
Vendor
CVE Published:
29 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13588?

A vulnerability has been identified in seladb PcapPlusPlus version 25.05, specifically within the TLS Hello Handler. The issue lies in the function pcpp::SSLClientHelloMessage::getHandshakeVersion located in the file Packet++/src/SSLHandshake.cpp. Manipulating the handshakeVersion argument can result in a heap-based buffer overflow, which poses a risk for remote exploitation. Although the complexity of this attack is high and its exploitability is considered difficult, it has been publicly disclosed, emphasizing the necessity of applying the available patch (commit 98e671010bc7c87b95898c22ae289220ae92542b) to mitigate this vulnerability effectively.

Affected Version(s)

PcapPlusPlus 25.05

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-2026-13588 - Proof of Concept

References

https://vuldb.com/vuln/374591
vdb-entrytechnical-description
https://vuldb.com/vuln/374591/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13588
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

TYGLS (VulDB User)
.