CVE-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 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.
Actively exploited
- In the CISA exploited-vulnerabilities catalogue since Oct 2, 2025
- US federal agencies must remediate it by Oct 23, 2025 (BOD 22-01)
- First attack observed 1248 days after disclosure
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Source: CISA KEV · Jan 20, 2026 Oct 2, 2025 Mar 31, 2025 Jul 23, 2024 Mar 1, 2018
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HAffected products
| Vendors | Product | Versions |
|---|---|---|
| gnu | bash | 1.14.0 |
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