CVE-2026-62943Network attack vectorHinoki check available

Authenticated command execution via unterminated allowlist regex

Published Sep 18, 2026 · Updated Sep 18, 2026

OS command injection in digint btrbk 0.29.0 through 0.32.6 allows remote authenticated users to execute commands on backup targets. The ssh_filter_btrbk.sh allow_stream_match regular expression anchors only the start of SSH_ORIGINAL_COMMAND, so a valid btrbk prefix followed by a pipe and command passes the allowlist. Only authorized_keys forced-command deployments using this script are exposed, and injected commands run with the backup-target SSH account's privileges.

CVSS severity8.7
High
EPSS probability0.50%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OS command injection in digint btrbk 0.29.0 through 0.32.6 allows remote authenticated users to execute commands on backup targets. The ssh_filter_btrbk.sh allow_stream_match regular expression anchors only the start of SSH_ORIGINAL_COMMAND, so a valid btrbk prefix followed by a pipe and command passes the allowlist. Only authorized_keys forced-command deployments using this script are exposed, and injected commands run with the backup-target SSH account's privileges.

The record

CVE
CVE-2026-62943
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
digint
Product
btrbk
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=>= 0.29.0, < 0.32.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

digint · btrbkversion=>= 0.29.0, < 0.32.7

Published CVSS scores

8.7GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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