CVE-2026-58465

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-02. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Eclipse Wakaama before snapshot/2026-05-26 contains an unbounded memory allocation vulnerability in the CoAP Block1 handler within coap/block.c that allows unauthenticated remote attackers to exhaust server memory by sending a sequence of Block1 PUT requests with incrementing block numbers. Attackers can target the registration endpoint over UDP without authentication, causing the server to repeatedly reallocate a growing accumulation buffer by appending each block payload without enforcing any maximum total size limit, resulting in denial of service through memory exhaustion.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
42.3%
KEV
Not listed

Published

July 2, 2026

Last Modified

July 6, 2026

Advisory Details (3)

Auto-updated Jul 2, 2026
Patch available. Sources: github_commit, github_pr.
generic

Eclipse Wakaama CoAP Block1 Handler Unbounded Memory Allocation DoS | Advisories | VulnCheck

https://www.vulncheck.com/advisories/eclipse-wakaama-coap-block1-handler-unbounded-memory-allocation-dos
github_pr Patch Available

coap: Fix unbounded allocation in block1 handling

Patch available: eclipse-wakaama/wakaama snapshots/2026-05-26 (PR #881 merged 2026-05-07)

https://github.com/eclipse-wakaama/wakaama/pull/881
github_commit Patch Available

commit a83f1ca28fa0 (eclipse-wakaama/wakaama)

Patch available: eclipse-wakaama/wakaama snapshots/2026-05-26 (contains commit a83f1ca28fa0)

https://github.com/eclipse-wakaama/wakaama/commit/a83f1ca28fa090fbc03c3669fef40daf4f89cd03

Vendor Advisories for CVE-2026-58465(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 26× in last 7d / 26× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 05:55 UTCEG score recompute
  2. 2026-07-07 05:55 UTCGHSA enrichment
  3. 2026-07-06 16:41 UTCEG score recompute
  4. 2026-07-06 16:41 UTCGHSA enrichment
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 03:28 UTCEG score recompute
  8. 2026-07-06 03:28 UTCGHSA enrichment
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 14:13 UTCEG score recompute
  12. 2026-07-05 14:13 UTCGHSA enrichment
  13. 2026-07-05 02:31 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-05 01:01 UTCEG score recompute
  16. 2026-07-05 01:01 UTCGHSA enrichment
  17. 2026-07-04 11:47 UTCEG score recompute
  18. 2026-07-04 11:46 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-03 22:33 UTCEG score recompute
  22. 2026-07-03 22:33 UTCGHSA enrichment
  23. 2026-07-03 09:19 UTCEG score recompute
  24. 2026-07-03 09:19 UTCGHSA enrichment
  25. 2026-07-02 20:06 UTCEG score recompute
Show 1 more
  1. 2026-07-02 20:05 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-58465?
CVE-2026-58465 is a high vulnerability published on July 2, 2026. Eclipse Wakaama before snapshot/2026-05-26 contains an unbounded memory allocation vulnerability in the CoAP Block1 handler within coap/block.c that allows unauthenticated remote attackers to exhaust server memory by sending a sequence of Block1 PUT requests with incrementing block numbers.…
When was CVE-2026-58465 disclosed?
CVE-2026-58465 was first published in the National Vulnerability Database on July 2, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58465 actively exploited?
CVE-2026-58465 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-58465?
CVE-2026-58465 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-58465?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58465, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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