CVE-2026-46673 json
Russh: Unchecked CryptoVec allocation and growth handling is reachable from local agent inputs in current russh releases and from remote SSH traffic in historical pre-0.58.0 releases
published 2026-05-15 5 mo ago modified 2026-10-12 27 d ago also GHSA-g9f8-wqj9-fjw5 , RUSTSEC-2026-0153 , RUSTSEC-2026-0154 , EUVD-2026-36124
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
Russh is a Rust SSH client & server library. Prior to version 0.60.3, CryptoVec used unchecked capacity growth, unchecked length arithmetic, and unsafe allocation/locking paths. In current russh releases, local SSH agent peers could still feed attacker-controlled frame lengths into buffer growth before validation. In older russh releases before 0.58.0, remote SSH traffic also reached CryptoVec through transport and compression buffers. This issue has been patched in version 0.60.3.
Patch / fix
- crates.io russh-cryptovec 0.60.3
- crates.io russh 0.60.3
- rust-russh Debian 14 0.64.1-1
- rust-russh-cryptovec Debian 14 0.62.0-1
debian advisories DEBIAN-CVE-2026-46673
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/Eugeny/russh/security/advisories/GHSA-g9f8-wqj9-fjw5 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | russh-cryptovec | <0.60.3 >=0.0.0-0, <0.60.3 |
0.60.3 |
| crates.io | russh | <0.60.3 >=0.0.0-0, <0.60.3 |
0.60.3 |
Affected products
- Eugeny russh
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
-
github.com
/Eugeny/russh/commit/a2d48a71fe93d18cbd666c8d53d0882f5ce110c4
web
-
github.com
/Eugeny/russh/security/advisories/GHSA-g9f8-wqj9-fjw5
exploit, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-46673
advisory
-
github.com
/Eugeny/russh
package
-
rustsec.org
/advisories/RUSTSEC-2026-0153.html
web, advisory
-
rustsec.org
/advisories/RUSTSEC-2026-0154.html
web, advisory
-
crates.io
/crates/russh
package
-
crates.io
/crates/russh-cryptovec
package
Sources
- CVE List CVE-2026-46673
- GitHub Advisory GHSA-g9f8-wqj9-fjw5
- NVD CVE-2026-46673
- OSV RUSTSEC-2026-0154
- OSV RUSTSEC-2026-0153
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