CVE-2026-7598

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory published 2026-05-02. NVD baseline CVSS 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.3Exploit: NoneExposed: 0

A fix is available — apply it.

A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue.

CVSS v3
7.3
EG Score
7.3(medium)
EPSS
37.2%
KEV
Not listed

Published

May 1, 2026

Last Modified

June 30, 2026

Advisory Details (3)

Auto-updated May 1, 2026
No patch confirmed yet.
generic

userauth.c: username_len bounds checking by willco007 · Pull Request #1858 · libssh2/libssh2 · GitHub

https://github.com/libssh2/libssh2/pull/1858
generic

userauth.c: username_len bounds checking (#1858) · libssh2/libssh2@256d04b · GitHub

https://github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1
generic

GitHub - libssh2/libssh2: the SSH library · GitHub

https://github.com/libssh2/libssh2/

Vendor Advisories for CVE-2026-7598(4)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibssh2-1t64 (1.11.1-1ubuntu0.25.10.1) @ questing2026-06-14ubuntu
redhatrust-main-1.95.0-5.hum12026-05-13redhat
redhatlibssh2-main-1.11.1-5.1.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.

Weakness Classification(2)

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 13× in last 7d / 46× 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 141 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-7598?
CVE-2026-7598 is a high vulnerability published on May 1, 2026. A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauthpassword of the file src/userauth.c. Such manipulation of the argument usernamelen/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is…
When was CVE-2026-7598 disclosed?
CVE-2026-7598 was first published in the National Vulnerability Database on May 1, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-7598 actively exploited?
CVE-2026-7598 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-7598?
CVE-2026-7598 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-7598?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-7598, 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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