7.5

CVE-2026-48110: eugeny russh Improper Input Validation

CVSS: 7.5v3.1HighDeferred
AliasesDEBIAN-CVE-2026-48110GHSA-4r3c-5hpg-58qr
Published 10-06-2026Last modified 11-06-2026
Open JSON

Vulnerability summary

CVE-2026-48110 is a high (CVSS 7.5) Improper Input Validation vulnerability in eugeny russh. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.46%
0%100%
Low · +0.09 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 10-06-2026
    PublishedVulnerability first disclosed.
  2. 11-06-2026
    Last modifiedVulnerability information updated.

Description

Russh is a Rust SSH client & server library. From version 0.34.0 to before version 0.61.0, several russh client and server message handlers decoded attacker-controlled SSH strings, name-lists, and byte fields into owned allocations before applying field-specific bounds. A remote SSH peer could send oversized, high-fanout, or malformed length-prefixed fields and make the library allocate, attempt to allocate, or split data before rejecting input that should have been rejected earlier. This issue has been patched in version 0.61.0.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

+0.09 pp

From 0.37% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Crates.Io1 product
  • russh≥ 0.34.0, < 0.61.0
Debian1 product
  • rust-russhAll versions (No fix recorded) | < 0.64.1-1
Eugeny1 product
  • russh≥ 0.34.0, < 0.61.0

3 vendors · 3 products

References

5 links