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
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 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 PROB
0%
EPSS %ILE
12%
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) @ jammy2026-09-14ubuntu

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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libnfs4.0.0-14.0.0-1+deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libnfs4.0.0-14.0.0-1+deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libnfs5.0.2-1, 5.0.2-1+deb13u1, 5.0.2-1.1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libnfs5.0.2-15.0.2-1.1—

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 7× in last 7d / 43× 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 341 total refreshes for this CVE.

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

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 0% probability of exploitation in the next 30 days, which ranks it in the top 88.2% of all scored CVEs.
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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