CVE-2026-13588 seladb PcapPlusPlus TLS Hello SSLHandshake.cpp getHandshakeVersion heap-based overflow
A heap-based buffer overflow in PcapPlusPlus allows remote attackers to potentially execute code or cause denial of service via crafted TLS Hello messages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-13588?
CVE-2026-13588 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 determined in seladb PcapPlusPlus 25.05. The impacted element is the function pcpp::SSLClientHelloMessage::getHandshakeVersion of the file Packet++/src/SSLHandshake.cpp of the component TLS Hello Handler. Executing a manipulation of the argument handshakeVersion can lead to heap-based buffer overflow. It is possible to launch the attack remotely. This attack is characterized by high complexity. The exploitability is regarded as difficult. The exploit has been publicly disclosed and may be utilized. This patch is called 98e671010bc7c87b95898c22ae289220ae92542b. It is best practice to apply a patch to resolve this issue.
Which versions are affected by CVE-2026-13588?
How do I fix CVE-2026-13588?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-13588 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13588 exists.
Sources
Also known as GHSA-9f2x-4g7j-783f.