CVE-2026-0966

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 55% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 8.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in libssh. The API function ssh_get_hexa() is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to SSH_LOG_PACKET (3) or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
52
EG Risk 52/100

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
Severity82% × 45%
Exploitation1% × 40%
Automatability100% × 15%
EPSS PROB
0.6%
EPSS %ILE
46th
KEV
Not listed

Published

March 26, 2026

Last Modified

September 1, 2026

Advisory Details (4)

Auto-updated Apr 30, 2026
Patch available. Sources: redhat.
generic

libssh 0.12.0 and 0.11.4 security releases – libssh

https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/
redhat

2433121 – (CVE-2026-0966) CVE-2026-0966 libssh: Buffer underflow in ssh_get_hexa() on invalid input

https://bugzilla.redhat.com/show_bug.cgi?id=2433121
redhatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-0966
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:7067

Vendor Advisories for CVE-2026-0966(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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibssh-gcrypt-dev (0.8.0~20170825.94fa1e38-1ubuntu0.7+esm6) @ bionic2026-09-01ubuntu
ubuntulibssh-doc (0.11.2-1ubuntu0.2) @ questing2026-09-01ubuntu
redhatlibssh-0:0.12.0-2.el102026-05-19redhat
redhatlibssh-0:0.10.4-18.el92026-05-19redhat
redhatlibssh-main-0.12.0-1.1.hum12026-04-08redhat

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 rangeFix by version rangeDependents
libssh0.10.4-1 ... 0.9.8-0+deb11u2 (25 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libssh0.10.5-2 ... 0.12.2-1 (17 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libssh0.11.2-1, 0.11.2-1+deb13u1, 0.11.3-1
  • every version up to 0.11.5-0+deb13u1: fixed in 0.11.5-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libssh0.11.2-1, 0.11.3-1
  • every version up to 0.12.0-1: fixed in 0.12.0-1
—

Weakness Classification(1)

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 8× in last 7d / 23× 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 233 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-0966?
CVE-2026-0966 is a high vulnerability published on March 26, 2026. A flaw was found in libssh. The API function sshgethexa() is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is…
When was CVE-2026-0966 disclosed?
CVE-2026-0966 was first published on March 26, 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-2026-0966 actively exploited?
CVE-2026-0966 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-0966?
CVE-2026-0966 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-0966?
A fix for CVE-2026-0966 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-0966 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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