CVE-2026-54417

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-17. 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: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

An integer overflow in the mtar_next function in src/microtar.c in rxi microtar 0.1.0 allows a remote attacker to cause a denial of service (uncontrolled CPU consumption / infinite loop) via a crafted tar archive. mtar_next computes the offset to the next record as round_up(h.size, 512) + sizeof(mtar_raw_header_t) using 32-bit arithmetic.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

June 17, 2026

Last Modified

August 10, 2026

Advisory Details (3)

Auto-updated Jun 18, 2026
No patch confirmed yet.
generic
https://raw.githubusercontent.com/rxi/microtar/master/src/microtar.c
generic

microtar/src/microtar.c at master · rxi/microtar · GitHub

https://github.com/rxi/microtar/blob/master/src/microtar.c#L239
generic

GitHub - rxi/microtar: A lightweight tar library written in ANSI C · GitHub

https://github.com/rxi/microtar

Vendor Advisories for CVE-2026-54417(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 99× 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 221 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54417?
CVE-2026-54417 is a high vulnerability published on June 17, 2026. An integer overflow in the mtarnext function in src/microtar.c in rxi microtar 0.1.0 allows a remote attacker to cause a denial of service (uncontrolled CPU consumption / infinite loop) via a crafted tar archive. mtarnext computes the offset to the next record as roundup(h.size, 512) +…
When was CVE-2026-54417 disclosed?
CVE-2026-54417 was first published in the National Vulnerability Database on June 17, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54417 actively exploited?
CVE-2026-54417 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.3% of all scored CVEs.
What is the CVSS score of CVE-2026-54417?
CVE-2026-54417 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-54417?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54417, 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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