Heap-Based Buffer Overflow in PcapPlusPlus from Seladb
CVE-2026-13587

6.3MEDIUM

Key Information:

Vendor

Seladb

Status
Pcapplusplus
Vendor
CVE Published:
29 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13587?

A vulnerability has been detected in PcapPlusPlus version 25.05 specifically within the LightPcapNg Parser. The issue arises in the 'parse_by_block_type' function located in the file 'light_pcapng.c'. An attacker can exploit this vulnerability by manipulating the 'captured_packet_length' argument, leading to a heap-based buffer overflow situation. This flaw allows potential remote attacks, making it critical for users to evaluate their systems' security to mitigate risks associated with this vulnerability.

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-2026-13587 - Proof of Concept

References

https://vuldb.com/vuln/374590
vdb-entrytechnical-description
https://vuldb.com/vuln/374590/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13587
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
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)
.