CVE-2026-53689

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-10. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0

A fix is available — apply it.

libnfs through 6.0.2 before 55c18ea does not validate a string size, leading to an integer overflow during a connection to a crafted NFS server. This occurs in libnfs_zdr_string in lib/libnfs-zdr.c.

CVSS v3
7.1
EG Score
7.1(high)
EPSS
9.1%
KEV
Not listed

Published

June 10, 2026

Last Modified

June 10, 2026

Advisory Details (1)

Auto-updated Jun 11, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit 55c18ea33a83 (sahlberg/libnfs)

Fix landed in sahlberg/libnfs commit 55c18ea33a83 — awaiting tagged release

https://github.com/sahlberg/libnfs/commit/55c18ea33a83d667f79f0ef209c96895795c729f

Vendor Advisories for CVE-2026-53689(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibnfs14 (5.0.2-1ubuntu1.1) @ resolute2026-07-06ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 43× in last 7d / 160× 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 160 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-53689?
CVE-2026-53689 is a high vulnerability published on June 10, 2026. libnfs through 6.0.2 before 55c18ea does not validate a string size, leading to an integer overflow during a connection to a crafted NFS server. This occurs in libnfszdrstring in lib/libnfs-zdr.c.
When was CVE-2026-53689 disclosed?
CVE-2026-53689 was first published in the National Vulnerability Database on June 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53689 actively exploited?
CVE-2026-53689 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53689?
CVE-2026-53689 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-53689?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53689, 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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