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Findings

CVE-2014-6278

GNU Bash OS Command Injection Vulnerability

Published Sep 30, 2014 · updated Jun 16, 2026 · GNU GNU Bash

GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary commands via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271, CVE-2014-7169, and CVE-2014-6277.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 30, 2014 · Catalog

    Detected

    GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary commands via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other s

  2. Oct 2, 2025 · CISA KEV

    Known exploited

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  3. Oct 23, 2025 · CISA KEV

    Remediation due

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  4. Jun 16, 2026 · Catalog

    Updated

    GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary commands via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other s

Required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA due date Oct 23, 2025

Affected

  • cpe gnu/bash1.14.0
  • cpe gnu/bash1.14.1
  • cpe gnu/bash1.14.2
  • cpe gnu/bash1.14.3
  • cpe gnu/bash1.14.4
  • cpe gnu/bash1.14.5
  • cpe gnu/bash1.14.6
  • cpe gnu/bash1.14.7
  • vendor GNU GNU Bashversion unspecified

Sources

  • CISA KEVCVE-2014-6278

    GNU Bash contains an OS command injection vulnerability which allows remote attackers to execute arbitrary commands via a crafted environment.

    cisa.gov
  • CVE.orgCVE-2014-6278

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2014-6278

    30-day exploitation probability 99.7%

    first.org
  • Exploit Database34900

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Exploit Database39568

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Exploit Database39887

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit Modulesauxiliary_scanner/http/apache_mod_cgi_bash_env

    Public module reference (normal). Module source is not copied into this catalog.

    rapid7.com
  • Metasploit Modulesexploit_multi/http/apache_mod_cgi_bash_env_exec

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • Metasploit Modulesexploit_multi/http/cups_bash_env_exec

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDCVE-2014-6278

    GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary commands via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH ssh

    nvd.nist.gov

References