CVE-2026-58465

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM 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 — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 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(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
58%
KEV
Not listed

Published

July 2, 2026

Last Modified

July 14, 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 9× in last 7d / 70× 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.

Showing the most recent 100 of 207 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 09:35 UTCEPSS rescore
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 14:19 UTCEG score recompute
  6. 2026-09-06 14:19 UTCGHSA enrichment
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-05 23:53 UTCEG score recompute
  9. 2026-09-05 23:53 UTCGHSA enrichment
  10. 2026-09-04 05:07 UTCEPSS rescore
  11. 2026-09-02 14:12 UTCEPSS rescore
  12. 2026-09-01 13:54 UTCEPSS rescore
  13. 2026-09-01 04:40 UTCEPSS rescore
  14. 2026-08-31 00:34 UTCEG score recompute
  15. 2026-08-31 00:34 UTCGHSA enrichment
  16. 2026-08-30 19:17 UTCEPSS rescore
  17. 2026-08-30 11:22 UTCEG score recompute
  18. 2026-08-30 11:22 UTCGHSA enrichment
  19. 2026-08-30 01:22 UTCEPSS rescore
  20. 2026-08-28 21:42 UTCEPSS rescore
  21. 2026-08-27 22:15 UTCEG score recompute
  22. 2026-08-27 22:15 UTCGHSA enrichment
  23. 2026-08-27 14:25 UTCEPSS rescore
  24. 2026-08-26 14:46 UTCEPSS rescore
  25. 2026-08-25 16:06 UTCEG score recompute
Show 75 more
  1. 2026-08-25 16:06 UTCGHSA enrichment
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-25 02:54 UTCEG score recompute
  4. 2026-08-25 02:54 UTCGHSA enrichment
  5. 2026-08-24 13:41 UTCEG score recompute
  6. 2026-08-24 13:41 UTCGHSA enrichment
  7. 2026-08-24 00:28 UTCGHSA enrichment
  8. 2026-08-23 11:17 UTCEG score recompute
  9. 2026-08-23 11:17 UTCGHSA enrichment
  10. 2026-08-23 00:19 UTCEPSS rescore
  11. 2026-08-22 22:05 UTCGHSA enrichment
  12. 2026-08-22 08:50 UTCEG score recompute
  13. 2026-08-22 08:50 UTCGHSA enrichment
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 19:39 UTCGHSA enrichment
  16. 2026-08-21 06:27 UTCEG score recompute
  17. 2026-08-21 06:27 UTCGHSA enrichment
  18. 2026-08-20 22:55 UTCEPSS rescore
  19. 2026-08-20 17:15 UTCGHSA enrichment
  20. 2026-08-20 04:02 UTCEG score recompute
  21. 2026-08-20 04:02 UTCGHSA enrichment
  22. 2026-08-19 17:04 UTCEPSS rescore
  23. 2026-08-19 10:17 UTCGHSA enrichment
  24. 2026-08-18 20:54 UTCEG score recompute
  25. 2026-08-18 20:54 UTCGHSA enrichment
  26. 2026-08-18 13:48 UTCEPSS rescore
  27. 2026-08-17 22:51 UTCEG score recompute
  28. 2026-08-17 22:51 UTCGHSA enrichment
  29. 2026-08-17 13:47 UTCEPSS rescore
  30. 2026-08-17 06:07 UTCGHSA enrichment
  31. 2026-08-16 16:12 UTCEG score recompute
  32. 2026-08-16 16:12 UTCGHSA enrichment
  33. 2026-08-16 14:56 UTCEPSS rescore
  34. 2026-08-16 03:01 UTCEG score recompute
  35. 2026-08-16 03:01 UTCGHSA enrichment
  36. 2026-08-16 02:14 UTCEPSS rescore
  37. 2026-08-15 13:50 UTCEG score recompute
  38. 2026-08-15 13:50 UTCGHSA enrichment
  39. 2026-08-15 01:30 UTCEPSS rescore
  40. 2026-08-15 00:38 UTCGHSA enrichment
  41. 2026-08-14 11:26 UTCGHSA enrichment
  42. 2026-08-13 22:15 UTCEG score recompute
  43. 2026-08-13 22:15 UTCGHSA enrichment
  44. 2026-08-13 22:00 UTCEPSS rescore
  45. 2026-08-13 09:04 UTCGHSA enrichment
  46. 2026-08-12 19:51 UTCEG score recompute
  47. 2026-08-12 19:51 UTCGHSA enrichment
  48. 2026-08-12 13:51 UTCEPSS rescore
  49. 2026-08-12 06:39 UTCGHSA enrichment
  50. 2026-08-11 17:27 UTCEG score recompute
  51. 2026-08-11 17:27 UTCGHSA enrichment
  52. 2026-08-11 04:03 UTCEG score recompute
  53. 2026-08-11 04:03 UTCGHSA enrichment
  54. 2026-08-11 00:00 UTCEPSS rescore
  55. 2026-08-10 14:52 UTCGHSA enrichment
  56. 2026-08-10 01:40 UTCEG score recompute
  57. 2026-08-10 01:40 UTCGHSA enrichment
  58. 2026-08-09 13:46 UTCEPSS rescore
  59. 2026-08-09 12:29 UTCGHSA enrichment
  60. 2026-08-08 23:17 UTCEG score recompute
  61. 2026-08-08 23:17 UTCGHSA enrichment
  62. 2026-08-08 16:37 UTCEPSS rescore
  63. 2026-08-08 10:05 UTCGHSA enrichment
  64. 2026-08-07 20:54 UTCEG score recompute
  65. 2026-08-07 20:54 UTCGHSA enrichment
  66. 2026-08-07 07:43 UTCGHSA enrichment
  67. 2026-08-06 18:32 UTCEG score recompute
  68. 2026-08-06 18:32 UTCGHSA enrichment
  69. 2026-08-06 13:47 UTCEPSS rescore
  70. 2026-08-06 05:20 UTCEG score recompute
  71. 2026-08-06 05:20 UTCGHSA enrichment
  72. 2026-08-05 19:17 UTCEPSS rescore
  73. 2026-08-05 16:09 UTCGHSA enrichment
  74. 2026-08-04 23:27 UTCEG score recompute
  75. 2026-08-04 23:27 UTCGHSA enrichment

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 14, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 41.7% of all scored CVEs.
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.

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