{"cve":"CVE-2026-54700","nvd":{"published":"2026-10-13T16:17:21.560","modified":"2026-10-16T23:17:02.113","status":"Deferred","description":"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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":6.9},"cvss_v3":null,"cwes":["CWE-20","CWE-789"],"references":["https://github.com/connectbot/cbssh/commit/a08421fbe7cf8b72fa60fb8b2f98fb465dc43fd9","https://github.com/connectbot/cbssh/pull/194","https://github.com/connectbot/cbssh/releases/tag/v0.3.1","https://github.com/connectbot/cbssh/security/advisories/GHSA-ch3q-cw5r-f4hg"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:58:52.678897993+00:00"},"epss":{"cve":"CVE-2026-54700","score":0.0037,"percentile":0.30597,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-ch3q-cw5r-f4hg","url":"https://osv.dev/vulnerability/GHSA-ch3q-cw5r-f4hg","summary":"ConnectBot SSH Client Library: Unbounded SSH field lengths can cause excessive memory allocation","modified":"2026-07-08T17:56:37.629592Z","packages":[{"ecosystem":"Maven","name":"org.connectbot.sshlib:sshlib","purl":"pkg:maven/org.connectbot.sshlib/sshlib","ranges":["<=0.3.0"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}