CVE-2026-59847

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 74% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

July 21, 2026

Last Modified

September 4, 2026

Advisory Details (2)

Auto-updated Jul 21, 2026
Patch available. Sources: redhat.
redhat

2498180 – (CVE-2026-59847) CVE-2026-59847 libssh: libssh: integrity downgrade via OpenSSL AES-GCM tag verification

https://bugzilla.redhat.com/show_bug.cgi?id=2498180
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-59847

Vendor Advisories for CVE-2026-59847(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) @ resolute2026-09-11ubuntu
redhatlibssh-0:0.9.6-17.el8_102026-09-01redhat
redhatlibssh-0:0.10.4-19.el9_82026-09-01redhat
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 21× in last 7d / 132× 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 248 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-59847?
CVE-2026-59847 is a high vulnerability published on July 21, 2026. A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection.
When was CVE-2026-59847 disclosed?
CVE-2026-59847 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on September 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59847 actively exploited?
CVE-2026-59847 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 73.8% of all scored CVEs.
What is the CVSS score of CVE-2026-59847?
CVE-2026-59847 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-59847?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59847, 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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