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TI-2025-36950 Aliases CVE-2025-59391GHSA-7v9m-g6fx-mq4f

A memory disclosure vulnerability exists in libcoap's OSCORE configuration parser in…

Priority LOW 34CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

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 occur when parsing certain configuration values, allowing an attacker to infer or read memory beyond string boundaries in the .rodata section. This could potentially lead to information disclosure or denial of service.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00261 17th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:libcoap:libcoap:*:*:*:*:*:*:*:*before 4.3.5aVulnerablelibcoap
  • cpe:2.3:a:libcoap:libcoap:*:*:*:*:*:*:*:* Versions before 4.3.5a Vulnerable ·libcoap

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-59391
  2. 2026-10-03 Alias added: GHSA-7v9m-g6fx-mq4f

References

Patch 1

Other 1

  • TI-2024-00887 obgm libcoap Configuration File coap_oscore.c get_split_entry stack-based overflow CVSS 3.1HIGH 7.8
  • TI-2024-20447 An issue in `coap_pdu.c` in libcoap 4.3.4 allows attackers to cause undefined behavior… CVSS 3.1HIGH 7.5
  • TI-2023-17937 libcoap 4.3.1 contains a buffer over-read via the function coap_parse_oscore_conf_mem at coap_oscore.c. CVSS 3.1MEDIUM 6.5
  • TI-2026-23178 libcoap Out-of-Bounds Read in OSCORE CBOR Unwrap Handling CVSS 4.0HIGH 8.8
  • TI-2023-14242 Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56… CVSS 3.1HIGH 7.5
  • TI-2025-40369 NULL pointer dereference in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote… CVSS 3.1HIGH 7.5
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences