Answer in brief
CVE-2026-73489 records a Medium severity (CVSS 4.3) vulnerability in Russh: Post-auth remote panic via pty-req with more than 130 terminal-mode records. The current sources do not mark it as known exploited. The current feed maps russh (crates.io), Eugeny/russh (generic), russh (rust). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 4.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps russh (crates.io), Eugeny/russh (generic), russh (rust). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| russhcrates.io | >=0 <0.62.4 | 0.62.4 |
| Eugeny/russhgeneric | < 0.62.4 | Not reported |
| russhrust | <=0.62.3 | 0.62.4 |
Published upstream
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 12, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-73489 records a Medium severity (CVSS 4.3) vulnerability in Russh: Post-auth remote panic via pty-req with more than 130 terminal-mode records. The current sources do not mark it as known exploited. The current feed maps russh (crates.io), Eugeny/russh (generic), russh (rust). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 4.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps russh (crates.io), Eugeny/russh (generic), russh (rust). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| russhcrates.io | >=0 <0.62.4 | 0.62.4 |
| Eugeny/russhgeneric | < 0.62.4 | Not reported |
| russhrust | <=0.62.3 | 0.62.4 |
Published upstream
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 12, 2026
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.
Quoted source text, attributed separately from HOL analysis.