CVE-2026-26459 Memory corruption in n/a
A segmentation fault in the ccoap library allows attackers to cause a denial of service by sending malformed COAP messages with insufficient option data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-26459?
CVE-2026-26459 is a high-severity memory corruption vulnerability in n/a, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a vulnerability in the option parsing logic that causes a segmentation fault when processing malformed COAP messages with insufficient option data.
Weakness: CWE-787
Which versions are affected by CVE-2026-26459?
How do I fix CVE-2026-26459?
No fix has been published for CVE-2026-26459 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-26459 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26459 exists.
Sources
Also known as GHSA-r5fc-723c-2fph.