CVE-2026-59842

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 65% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in libssh. During server-side GSSAPI key exchange, a client-supplied Curve25519 public key shorter than the expected length is copied without proper length validation, leading to an out-of-bounds heap read. This could allow a remote unauthenticated attacker to disclose small amounts of server memory.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

July 21, 2026

Last Modified

August 19, 2026

Advisory Details (3)

Auto-updated Jul 30, 2026
Patch available. Sources: redhat.
redhat Patch Available

2498168 – (CVE-2026-59842) CVE-2026-59842 libssh: libssh: information disclosure via short GSSAPI Curve25519 public key

https://bugzilla.redhat.com/show_bug.cgi?id=2498168
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-59842
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:42922

Vendor Advisories for CVE-2026-59842(3)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatlibssh-0:0.12.0-3.el10_22026-08-17redhat
redhatlibssh-main-0.12.1-4.hum12026-07-21redhat

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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libssh0.11.2-1, 0.11.3-1, 0.12.0-1, 0.12.0-2, 0.12.0-30.12.1-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 86× 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 200 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-59842?
CVE-2026-59842 is a medium vulnerability published on July 21, 2026. A flaw was found in libssh. During server-side GSSAPI key exchange, a client-supplied Curve25519 public key shorter than the expected length is copied without proper length validation, leading to an out-of-bounds heap read. This could allow a remote unauthenticated attacker to disclose small…
When was CVE-2026-59842 disclosed?
CVE-2026-59842 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59842 actively exploited?
CVE-2026-59842 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 65.2% of all scored CVEs.
What is the CVSS score of CVE-2026-59842?
CVE-2026-59842 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-59842?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59842, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-59842

Explore →

Is Your Infrastructure Affected by CVE-2026-59842?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs