CVE-2026-73489 json
Russh: Post-auth remote panic via pty-req with more than 130 terminal-mode records
published 2026-07-24 3 mo ago modified 2026-10-24 16 d ago also EUVD-2026-58524 , GHSA-cqjc-rmpq-xprq
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 39%
- public exploits
- 0
- none known
Summary
Russh is a Rust SSH client & server library. Prior to 0.62.4, an authenticated SSH client can cause a denial of service by sending a pty-req channel request with more than 130 terminal-mode records. The parser in russh/src/server/encrypted.rs stores terminal modes in a fixed 130-entry [(Pty::TTY_OP_END, 0); 130] array but continues increasing the mode count, then constructs an out-of-bounds slice and panics before the application pty_request handler runs. The panic terminates the server session task without causing memory corruption. This issue is fixed in version 0.62.4.
Patch / fix
- crates.io russh 0.62.4
- russh_project russh 0.62.4
- warpgate_project warpgate 0.62.4
- rust-russh Debian 14 0.64.1-1
debian advisories DEBIAN-CVE-2026-73489
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/Eugeny/russh/security/advisories/GHSA-cqjc-rmpq-xprq referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | russh | <0.62.4 |
0.62.4 |
Affected products
- Eugeny russh
Classification
- Weakness
-
- CWE-129 Improper Validation of Array Index
References
Sources
- CVE List CVE-2026-73489
- GitHub Advisory GHSA-cqjc-rmpq-xprq
- NVD CVE-2026-73489
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.