CVE-2026-54697Public exploitHinoki check available

Application crash via unchecked DER private-key lengths

Published Oct 13, 2026 · Updated Oct 13, 2026

DER parsing in ConnectBot cbssh before 0.3.1 allows attackers to crash the application via an attacker-provided private-key file. DerReader.readLength() accumulates excessive length octets into an Int, and primitive readers allocate arrays without checking the declared size against remaining input. Exploitation requires an application or user to load the file; SSH server host keys and agent-forwarding messages do not reach this path, and no confidentiality or integrity impact is demonstrated.

CVSS severity6.7
Medium
EPSS probability0.13%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

DER parsing in ConnectBot cbssh before 0.3.1 allows attackers to crash the application via an attacker-provided private-key file. DerReader.readLength() accumulates excessive length octets into an Int, and primitive readers allocate arrays without checking the declared size against remaining input. Exploitation requires an application or user to load the file; SSH server host keys and agent-forwarding messages do not reach this path, and no confidentiality or integrity impact is demonstrated.

The record

CVE
CVE-2026-54697
Published
Oct 13, 2026
Updated
Oct 13, 2026
Vendor
ConnectBot
Product
cbssh
Classifications
CWE-789, CWE-190, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

ConnectBot · cbsshversion=< 0.3.1

Published CVSS scores

6.7GitHub_MCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-789Memory Allocation with Excessive Size Value
CWE-190Integer Overflow or Wraparound
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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