CVE-2026-53689

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM 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(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
11.6%
KEV
Not listed

Published

June 10, 2026

Last Modified

July 19, 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
ubuntulibnfs13 (4.0.0-1ubuntu0.1) @ jammy2026-07-16ubuntu

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 11× in last 7d / 124× 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 169 total refreshes for this CVE.

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

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, with the most recent update on July 19, 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 11.6% 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.

Dependency Blast Radius

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