Vulnerability index

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Libcoap CRITICAL 9.8
CVE-2026-29013

libcoap contains out-of-bounds read vulnerabilities in OSCORE Appendix B.2 CBOR unwrap handling where get_byte_inc() in src/oscore/oscore_cbor.c reli…

Fix: 4.3.5b+
Fix from $2,300 2026-04-17
Libcoap CRITICAL 9.8
CVE-2025-34468

libcoap versions up to and including 4.3.5, prior to commit 30db3ea, contain a stack-based buffer overflow in address resolution when attacker-contro…

Fix: after 4.3.5
Fix from $2,300 2025-12-31
Libcoap MEDIUM 6.5
CVE-2025-59391

A memory disclosure vulnerability exists in libcoap's OSCORE configuration parser in libcoap before release-4.3.5-patches. An out-of-bounds read may …

Fix: 4.3.5a+
Fix from $1,600 2025-12-08
Libcoap HIGH 7.5
CVE-2025-65495

Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service v…

Patch available
Fix from $1,950 2025-11-24
Libcoap HIGH 7.5
CVE-2025-65493

NULL pointer dereference in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS/TLS conn…

Patch available
Fix from $1,950 2025-11-24
Libcoap HIGH 7.5
CVE-2025-65494

NULL pointer dereference in get_san_or_cn_from_cert() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of servic…

Patch available
Fix from $1,950 2025-11-24
Libcoap HIGH 7.8
CVE-2024-0962

A vulnerability was found in obgm libcoap 4.3.4. It has been rated as critical. Affected by this issue is the function get_split_entry of the file sr…

Patch available
Fix from $1,950 2024-01-27
Libcoap HIGH 7.5
CVE-2023-30362

Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sens…

Fix: 4.3.1-120-ge242200+
Fix from $1,950 2023-06-23
Libcoap MEDIUM 6.5
CVE-2023-35862

libcoap 4.3.1 contains a buffer over-read via the function coap_parse_oscore_conf_mem at coap_oscore.c.

Patch available
Fix from $1,600 2023-06-19