CVE-2026-59846

LOWPre-NVD 3.93.9—
EchelonGraph scoreMEDIUM confidence

Score 3.9 from GitHub Security Advisory (severity: LOW) published 2026-07-21. a secondary CVSS source baseline 3.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
3.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.9Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior.

CVSS v3
3.9
EG Score
3.9(medium)
EG Risk
18(Track)
EG Risk 18/100SSVC: 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
Severity39% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

July 21, 2026

Last Modified

September 1, 2026

References (6)

Vendor Advisories for CVE-2026-59846(5)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibssh-doc (0.11.3-1ubuntu2.1) @ resolute2026-09-09ubuntu
redhatlibssh-0:0.10.4-19.el9_82026-09-01redhat
redhatlibssh-0:0.9.6-17.el8_102026-09-01redhat
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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libssh0.10.4-1 ... 0.9.8-0+deb11u2 (25 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libssh0.10.5-2 ... 0.12.2-1 (17 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libssh0.11.2-1, 0.11.2-1+deb13u1, 0.11.3-10.11.5-0+deb13u1—
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(2)

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

Additional Vendor Advisories

(2)

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 / 58× 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 116 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-59846?
CVE-2026-59846 is a low vulnerability published on July 21, 2026. A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior.
When was CVE-2026-59846 disclosed?
CVE-2026-59846 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59846 actively exploited?
CVE-2026-59846 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 97.9% of all scored CVEs.
What is the CVSS score of CVE-2026-59846?
CVE-2026-59846 has a CVSS v3 base score of 3.9 (NVD).
How do I remediate CVE-2026-59846?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59846, 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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