CVE-2026-26453
Last modified
CVE-2026-26453 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.15% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| — | — | n/a |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-26453?
How severe is CVE-2026-26453?
How do I fix CVE-2026-26453?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-26446Stomper 5e2741e is vulnerable to Denial of Service. When a b…7.5
- CVE-2026-26447Stomper 5e2741e is vulnerable to Use-After-Free. When a sing…7.5
- CVE-2026-26448Stomper 5e2741e is vulnerable to Use-After-Free. When a clie…9.8
- CVE-2026-26449In Stomper 5e2741e when a client sends a SEND frame missing …7.5
- CVE-2026-2645In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TL…7.5
- CVE-2026-26452ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 lcontains a v…7.5
- CVE-2026-26456A null pointer dereference vulnerability exists in the serve…7.5
- CVE-2026-26457ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a nu…7.5
- CVE-2026-26459ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a vu…7.5
- CVE-2026-2646A heap-buffer-overflow vulnerability exists in wolfSSL's wol…8.1
- CVE-2026-26460A HTML Injection vulnerability exists in the Dashboard modul…6.1
- CVE-2026-26461A Command Injection vulnerability in the web management inte…6.5
Are you affected by CVE-2026-26453?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST