CVE-2026-102824

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1% (2nd percentile of EPSS-scored CVEs). 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
Trending — Patch released this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Russh is a Rust SSH client and server library. Prior to 0.63.0, the hybrid ML-KEM 768 and X25519 implementation in russh/src/kex/hybrid_mlkem.rs accepts an all-zero 32-byte peer X25519 public key in both server_dh and compute_shared_secret, forcing the X25519 contribution to the combined shared secret to zero. A malicious SSH peer can therefore make the combined secret depend only on ML-KEM, defeating the hybrid exchange's intended fallback protection if ML-KEM is later weakened. This issue is fixed in version 0.63.0.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100CISA SSVC

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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 29, 2026

Last Modified

September 30, 2026

Advisory Details (3)

Auto-updated Sep 29, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

v0.63.0

Patch available: Eugeny/russh v0.63.0

https://github.com/Eugeny/russh/releases/tag/v0.63.0
github_commit Patch Available

commit 8da8967f1964 (Eugeny/russh)

Patch available: Eugeny/russh v0.63.0 (contains commit 8da8967f1964)

https://github.com/Eugeny/russh/commit/8da8967f196472576b1565d518a0ed60fce60f0c
github Patch Available🟡 PoC Available

Missing X25519 zero-point validation in hybrid ML-KEM key exchange · Advisory · Eugeny/russh · GitHub

https://github.com/Eugeny/russh/security/advisories/GHSA-w3jg-pjxf-73p4

Vendor Advisories for CVE-2026-102824(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatopenshell-main-0.1.2-0.2.hum12026-10-01redhat

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(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 13× 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. 2026-10-03 15:46 UTCEG score recompute
  2. 2026-10-03 15:46 UTCVendor advisory
  3. 2026-10-03 14:25 UTCEPSS rescore
  4. 2026-10-02 17:36 UTCEG score recompute
  5. 2026-10-02 17:36 UTCVendor advisory
  6. 2026-10-01 19:49 UTCEPSS rescore
  7. 2026-09-30 21:29 UTCEG score recompute
  8. 2026-09-30 20:27 UTCEG score recompute
  9. 2026-09-30 17:24 UTCEG score recompute
  10. 2026-09-30 15:02 UTCEPSS rescore
  11. 2026-09-29 19:20 UTCEG score recompute
  12. 2026-09-29 18:29 UTCEG score recompute
  13. 2026-09-29 18:28 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-102824?
CVE-2026-102824 is a medium vulnerability published on September 29, 2026. Russh is a Rust SSH client and server library. Prior to 0.63.0, the hybrid ML-KEM 768 and X25519 implementation in russh/src/kex/hybridmlkem.rs accepts an all-zero 32-byte peer X25519 public key in both serverdh and computesharedsecret, forcing the X25519 contribution to the combined shared secret…
When was CVE-2026-102824 disclosed?
CVE-2026-102824 was first published on September 29, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-102824 actively exploited?
CVE-2026-102824 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-102824?
CVE-2026-102824 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-102824?
A fix for CVE-2026-102824 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-102824 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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