Libcoap Security Vulnerabilities (CVEs)

Track 12 security vulnerabilities affecting Libcoap products and software. Get instant email alerts when new CVEs are discovered, automated security monitoring, and patch guidance.

1 Critical
4 High
7 Medium
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CVE-2025-34468 9.8

A stack-based buffer overflow vulnerability in libcoap allows remote attackers to crash applications or potentially execute arbitrary code when proxy ...

Dec 31, 2025
CVE-2025-59391 6.5

A memory disclosure vulnerability in libcoap's OSCORE configuration parser allows attackers to read memory beyond string boundaries in the .rodata sec...

Dec 8, 2025
CVE-2025-65495 7.5

A signedness error in libcoap's TLS certificate verification allows remote attackers to cause denial of service. When i2d_X509() returns -1 due to a m...

Nov 24, 2025
CVE-2025-65496 4.3

A NULL pointer dereference vulnerability in OISM libcoap's DTLS implementation allows remote attackers to crash applications using the library via a s...

Nov 24, 2025
CVE-2025-65497 4.3

A NULL pointer dereference vulnerability in OISM libcoap's DTLS cookie generation function allows remote attackers to cause denial of service. Attacke...

Nov 24, 2025
CVE-2025-65498 4.3

A NULL pointer dereference vulnerability in OISM libcoap's DTLS implementation allows remote attackers to crash the application via a specially crafte...

Nov 24, 2025
CVE-2025-65499 4.3

An array index error in OISM libcoap's TLS verification callback allows remote attackers to cause denial of service via a crafted DTLS handshake. This...

Nov 24, 2025
CVE-2025-65500 4.3

A NULL pointer dereference vulnerability in OISM libcoap's DTLS cookie generation function allows remote attackers to cause denial of service. Attacke...

Nov 24, 2025
CVE-2025-65501 4.3

A null pointer dereference vulnerability in libcoap's DTLS handshake processing allows remote attackers to crash applications using the library. This ...

Nov 24, 2025
CVE-2025-65493 7.5

A NULL pointer dereference vulnerability in OISM libcoap 4.3.5 allows remote attackers to cause denial of service via crafted DTLS/TLS connections. Th...

Nov 24, 2025
CVE-2025-65494 7.5

A NULL pointer dereference vulnerability in OISM libcoap's certificate parsing function allows remote attackers to cause denial of service by sending ...

Nov 24, 2025
CVE-2023-30362 7.5

This CVE describes a buffer overflow vulnerability in the coap_send function of libcoap library versions up to 4.3.1-103-g52cfd56. Attackers can explo...

Jun 23, 2023

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