CVE-2026-54417

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH 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
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 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. When the header size field is a multiple of 512 in the range 0xFFFFFC01-0xFFFFFE00 (e.g. 0xFFFFFE00), the addition wraps to 0, so mtar_next() seeks to the current record position instead of advancing. As a result, mtar_find() and any loop that iterates entries with mtar_next() repeat indefinitely over the same record, hanging the process at 100% CPU with no recovery.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
33.6%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 17, 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 34× in last 7d / 104× 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 104 total refreshes for this CVE.

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

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. 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 33.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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.

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