CVE-2026-13587 seladb PcapPlusPlus LightPcapNg light_pcapng.c parse_by_block_type heap-based overflow
A heap-based buffer overflow in PcapPlusPlus allows remote attackers to execute arbitrary code or cause denial of service via crafted packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-13587?
CVE-2026-13587 is a medium-severity memory corruption vulnerability in seladb PcapPlusPlus, published on 29 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was found in seladb PcapPlusPlus 25.05. The affected element is the function parse_by_block_type of the file light_pcapng.c of the component LightPcapNg Parser. Performing a manipulation of the argument captured_packet_length results in heap-based buffer overflow. It is possible to initiate the attack remotely. The attack's complexity is rated as high. The exploitability is described as difficult. The exploit has been made public and could be used.
Which versions are affected by CVE-2026-13587?
How do I fix CVE-2026-13587?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-13587 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13587 exists.
Sources
Also known as GHSA-94c3-8cq4-gwwg.