Answer in brief
CVE-2026-54700 records a Medium severity (CVSS 6.9) vulnerability in ConnectBot SSH: Unbounded SSH field lengths can cause excessive memory allocation. The current sources do not mark it as known exploited. The current feed maps connectbot/cbssh (generic), org.connectbot.sshlib:sshlib (maven), org.connectbot.sshlib:sshlib (maven). 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 6.9. 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 connectbot/cbssh (generic), org.connectbot.sshlib:sshlib (maven), org.connectbot.sshlib:sshlib (maven). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| connectbot/cbsshgeneric | <0.3.1 | 0.3.1 |
| org.connectbot.sshlib:sshlibmaven | <=0.3.0 | Not reported |
| org.connectbot.sshlib:sshlibmaven | >=0 | Not reported |
Published upstream
Oct 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
ConnectBot SSH Client Library is written in Kotlin with Kaitai Struct and KStateMachine. Prior to 0.3.1, the SSH protocol parser trusts attacker-controlled inner byte lengths and element counts without verifying that they fit in the containing packet. A malicious or compromised SSH server can return a small malformed packet whose oversized declarations cause the Kaitai Struct Java runtime to attempt excessive allocation or repeated parsing before detecting truncated input. The general transport path requires a client connection but no authentication or optional feature; malformed SSH-agent messages additionally require SSH agent forwarding. The issue can raise an uncaught OutOfMemoryError and terminate the application process, with no demonstrated confidentiality or integrity impact. This issue is fixed in version 0.3.1.
Quoted source text, attributed separately from HOL analysis.