CVE-2026-26453 Null dereference in n/a
A null pointer dereference in the ccoap library allows attackers to cause a denial of service via crafted COAP messages.
- 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-2026-26453?
CVE-2026-26453 is a high-severity 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 null pointer dereference vulnerability in the coap_server_handle_session() function when processing COAP messages containing URI_PATH options with NULL data pointers. When the server searches for a URI_PATH option matching the string "separate", it directly calls strncmp() on option_list[i].data without checking if the pointer is NULL. This causes a segmentation fault when the option's data field is NULL.
Weakness: CWE-476
Which versions are affected by CVE-2026-26453?
How do I fix CVE-2026-26453?
No fix has been published for CVE-2026-26453 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-26453 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26453 exists.
Sources
Also known as GHSA-cmf6-2rf8-75m6.