CVE-2026-37539

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-01. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Buffer overflow vulnerability in cannelloni v2.0.0 in CAN frame parsing in parser.cpp in function parseCANFrame, and decoder.cpp in function decodeFrame allowing remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted CAN FD frames.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

May 1, 2026

Last Modified

May 5, 2026

Advisory Details (2)

Auto-updated Sep 9, 2026
No patch confirmed yet.
generic

GitHub - mguentner/cannelloni: a SocketCAN over Ethernet tunnel · GitHub

https://github.com/mguentner/cannelloni
generic

Automotive CAN Protocol Libraries Multiple Buffer Overflows (CVE-2026-37534 through 37541, 42467-42469) · GitHub

https://gist.github.com/sgInnora/f4ac66faeefe07a653ceeb3f58cdc381

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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 281 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-37539?
CVE-2026-37539 is a critical vulnerability published on May 1, 2026. Buffer overflow vulnerability in cannelloni v2.0.0 in CAN frame parsing in parser.cpp in function parseCANFrame, and decoder.cpp in function decodeFrame allowing remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted CAN FD frames.
When was CVE-2026-37539 disclosed?
CVE-2026-37539 was first published in the National Vulnerability Database on May 1, 2026, with the most recent update on May 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-37539 actively exploited?
CVE-2026-37539 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 55.9% of all scored CVEs.
What is the CVSS score of CVE-2026-37539?
CVE-2026-37539 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-37539?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-37539, 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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