CVE-2026-48108

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 81% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Russh is a Rust SSH client & server library. From version 0.34.0-beta.1 to before version 0.61.0, russh did not enforce the SSH identification-string rules as deliberately as OpenSSH. In particular, the server-side identification reader used the same permissive path as the client, allowing pre-banner lines from clients, and the reader did not enforce a bounded number of pre-banner lines. For a library server built on russh, this could allow a remote peer to hold connection setup resources in the cleartext pre-authentication phase with malformed identification input that should have been rejected early. This issue has been patched in version 0.61.0.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
19.5%
KEV
Not listed

Published

June 10, 2026

Last Modified

June 11, 2026

Advisory Details (1)

Auto-updated Jun 13, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

SSH identification parsing accepted non-canonical client banners and did not bound pre-banner input · Advisory · Eugeny/russh · GitHub

https://github.com/Eugeny/russh/security/advisories/GHSA-76r6-x97p-67vr

Vendor Advisories for CVE-2026-48108(1)

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

Affected Packages

(1 across 1 ecosystem)
crates.io(1)
PackageVulnerable rangeFixed inDependents
russh—0.61.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 63× 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.

  1. 2026-07-07 03:26 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-05 11:08 UTCEG score recompute
  5. 2026-07-05 02:30 UTCEPSS rescore
  6. 2026-07-04 11:39 UTCEG score recompute
  7. 2026-07-03 08:33 UTCEG score recompute
  8. 2026-07-02 10:11 UTCEG score recompute
  9. 2026-07-01 15:07 UTCEPSS rescore
  10. 2026-07-01 11:56 UTCEG score recompute
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-30 13:41 UTCEG score recompute
  13. 2026-06-29 14:18 UTCEG score recompute
  14. 2026-06-29 14:06 UTCEPSS rescore
  15. 2026-06-29 14:06 UTCEPSS rescore
  16. 2026-06-28 16:03 UTCEG score recompute
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 04:56 UTCEPSS rescore
  19. 2026-06-28 04:56 UTCEPSS rescore
  20. 2026-06-27 17:47 UTCEG score recompute
  21. 2026-06-27 03:08 UTCEPSS rescore
  22. 2026-06-26 19:32 UTCEG score recompute
  23. 2026-06-25 21:17 UTCEG score recompute
  24. 2026-06-25 13:49 UTCEPSS rescore
  25. 2026-06-24 23:02 UTCEG score recompute
Show 38 more
  1. 2026-06-24 14:05 UTCEPSS rescore
  2. 2026-06-24 00:46 UTCEG score recompute
  3. 2026-06-23 21:33 UTCEPSS rescore
  4. 2026-06-23 21:33 UTCEPSS rescore
  5. 2026-06-23 02:19 UTCEG score recompute
  6. 2026-06-22 14:25 UTCEPSS rescore
  7. 2026-06-22 14:25 UTCEPSS rescore
  8. 2026-06-22 04:02 UTCEG score recompute
  9. 2026-06-21 14:56 UTCEPSS rescore
  10. 2026-06-21 14:56 UTCEPSS rescore
  11. 2026-06-21 04:51 UTCEG score recompute
  12. 2026-06-21 01:59 UTCEPSS rescore
  13. 2026-06-21 01:59 UTCEPSS rescore
  14. 2026-06-20 06:32 UTCEG score recompute
  15. 2026-06-19 19:26 UTCEPSS rescore
  16. 2026-06-19 19:26 UTCEPSS rescore
  17. 2026-06-19 08:17 UTCEG score recompute
  18. 2026-06-18 17:52 UTCEPSS rescore
  19. 2026-06-18 17:52 UTCEPSS rescore
  20. 2026-06-18 09:44 UTCEG score recompute
  21. 2026-06-17 17:53 UTCEPSS rescore
  22. 2026-06-17 11:29 UTCEG score recompute
  23. 2026-06-16 17:53 UTCEPSS rescore
  24. 2026-06-16 13:14 UTCEG score recompute
  25. 2026-06-15 17:49 UTCEPSS rescore
  26. 2026-06-15 17:49 UTCEPSS rescore
  27. 2026-06-15 14:24 UTCEG score recompute
  28. 2026-06-14 23:18 UTCEPSS rescore
  29. 2026-06-14 16:05 UTCEG score recompute
  30. 2026-06-13 23:00 UTCEPSS rescore
  31. 2026-06-13 17:49 UTCEG score recompute
  32. 2026-06-12 23:12 UTCEPSS rescore
  33. 2026-06-12 23:12 UTCEPSS rescore
  34. 2026-06-12 19:30 UTCEG score recompute
  35. 2026-06-11 21:15 UTCEG score recompute
  36. 2026-06-11 14:00 UTCEPSS rescore
  37. 2026-06-10 23:01 UTCEG score recompute
  38. 2026-06-10 23:00 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-48108?
CVE-2026-48108 is a medium vulnerability published on June 10, 2026. Russh is a Rust SSH client & server library. From version 0.34.0-beta.1 to before version 0.61.0, russh did not enforce the SSH identification-string rules as deliberately as OpenSSH. In particular, the server-side identification reader used the same permissive path as the client, allowing…
When was CVE-2026-48108 disclosed?
CVE-2026-48108 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on June 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48108 actively exploited?
CVE-2026-48108 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48108?
CVE-2026-48108 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-48108?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48108, 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-2026-48108

Explore →

Is Your Infrastructure Affected by CVE-2026-48108?

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

Start Free Scan →Browse All CVEs