Russh is a Rust SSH client & server library. Prior to 0.62.5, russh dispatches channel-scoped Handler callbacks for recipient channel IDs that were never opened or confirmed in russh/src/server/encrypted.rs, server_read_authenticated, and the exec_request callback. Version 0.62.5 fixes the issue.
CVE-2026-68930
MEDIUMPre-NVD 6.56.5Elevated
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: secondary
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 6.5Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.5
- EG Score
- 6.5(low)
- EG Risk
- 45(Track)EG Risk 45/100SSVC: 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 computedSeverity65% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
August 3, 2026
Last Modified
August 3, 2026
Advisory Details (3)
Auto-updated Aug 3, 2026🔬 Proof of concept available. Patch available. Sources: github_release, github, github_commit.
github_release Patch Available
v0.62.5
Patch available: Eugeny/russh v0.62.5
https://github.com/Eugeny/russh/releases/tag/v0.62.5github_commit Patch Available
commit 7c5659f8cf6f (Eugeny/russh)
Patch available: Eugeny/russh v0.62.5 (contains commit 7c5659f8cf6f)
https://github.com/Eugeny/russh/commit/7c5659f8cf6f6f2f9989d12dba0ebf49dc50a171github Patch Available🟡 PoC Available
Channel-scoped server callbacks can be reached without an open channel in russh · Advisory · Eugeny/russh · GitHub
https://github.com/Eugeny/russh/security/advisories/GHSA-m65r-rprj-r5rgVendor Advisories for CVE-2026-68930(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(3)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 3× in last 7d / 3× 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.
- 2026-08-03 17:40 UTCEG score recompute
- 2026-08-03 17:12 UTCEG score recompute
- 2026-08-03 16:08 UTCEG score recompute
Frequently asked(4)
What is CVE-2026-68930?
CVE-2026-68930 is a medium vulnerability published on August 3, 2026. Russh is a Rust SSH client & server library. Prior to 0.62.5, russh dispatches channel-scoped Handler callbacks for recipient channel IDs that were never opened or confirmed in russh/src/server/encrypted.rs, serverreadauthenticated, and the exec_request callback. Version 0.62.5 fixes the issue.
When was CVE-2026-68930 disclosed?
CVE-2026-68930 was first published in the National Vulnerability Database on August 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-68930?
CVE-2026-68930 has a CVSS v3 base score of 6.5 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-68930?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68930, 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
Explore the affected products and dependency analysis for CVE-2026-68930
Is Your Infrastructure Affected by CVE-2026-68930?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.