CVE-2014-6278GNU 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 environm…
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It affects gnu bash. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Oct 2, 2025; federal agencies had to remediate by Oct 23, 2025. Treat that date as your deadline.
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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.
- CVSS
- 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-78
- Known exploited
- Added to CISA KEV Oct 2, 2025; federal remediation due Oct 23, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 99.68% (percentile 100)
- Assigned by
- debian
- NVD analysis
- Analyzed
- Record last updated
- Dec 30, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
gnu bash gnu:bash | 1.14.0; 1.14.1; 1.14.2; 1.14.3; 1.14.4; 1.14.5; 1.14.6; 1.14.7; and 20 more ranges | NVD |
References
- http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004897x-refsource-confirm
- http://www-01.ibm.com/support/docview.wss?uid=swg21685749x-refsource-confirm
- http://marc.info/?l=bugtraq&m=141577137423233&w=2vendor-advisory, x-refsource-hp, third-party-advisory
- https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk102673&src=securityAlertsx-refsource-confirm
- http://linux.oracle.com/errata/ELSA-2014-3093x-refsource-confirm, third-party-advisory
- http://marc.info/?l=bugtraq&m=142721162228379&w=2vendor-advisory, x-refsource-hp
- http://marc.info/?l=bugtraq&m=142358026505815&w=2vendor-advisory, x-refsource-hp
- http://www-01.ibm.com/support/docview.wss?uid=swg21686479x-refsource-confirm
- http://jvn.jp/en/jp/JVN55667175/index.htmlthird-party-advisory, x-refsource-jvn
- http://secunia.com/advisories/60433third-party-advisory, x-refsource-secunia
- http://marc.info/?l=bugtraq&m=141383026420882&w=2vendor-advisory, x-refsource-hp, third-party-advisory
- http://marc.info/?l=bugtraq&m=141585637922673&w=2vendor-advisory, x-refsource-hp, third-party-advisory
- http://packetstormsecurity.com/files/137344/Sun-Secure-Global-Desktop-Oracle-Global-Desktop-Shellshock.htmlx-refsource-misc
- http://marc.info/?l=bugtraq&m=141576728022234&w=2vendor-advisory, x-refsource-hp, third-party-advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21685541x-refsource-confirm
- http://www.oracle.com/technetwork/topics/security/bashcve-2014-7169-2317675.htmlx-refsource-confirm
- http://secunia.com/advisories/61816third-party-advisory, x-refsource-secunia
- http://lists.opensuse.org/opensuse-updates/2014-10/msg00025.htmlvendor-advisory, x-refsource-suse, mailing-list
- http://secunia.com/advisories/61442third-party-advisory, x-refsource-secunia
- http://marc.info/?l=bugtraq&m=142358078406056&w=2vendor-advisory, x-refsource-hp
- http://secunia.com/advisories/61283third-party-advisory, x-refsource-secunia
- https://kc.mcafee.com/corporate/index?page=content&id=SB10085x-refsource-confirm
- http://secunia.com/advisories/61654third-party-advisory, x-refsource-secunia
- http://www.ubuntu.com/usn/USN-2380-1vendor-advisory, x-refsource-ubuntu
- http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5096315x-refsource-confirm
- http://jvndb.jvn.jp/jvndb/JVNDB-2014-000126third-party-advisory
- http://lcamtuf.blogspot.com/2014/09/bash-bug-apply-unofficial-patch-now.htmlpatch, third-party-advisory
- http://lcamtuf.blogspot.com/2014/10/bash-bug-how-we-finally-cracked.htmlthird-party-advisory
- http://linux.oracle.com/errata/ELSA-2014-3094third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00004.htmlmailing-list
- http://marc.info/?l=bugtraq&m=141330468527613&w=2third-party-advisory
- http://marc.info/?l=bugtraq&m=141345648114150&w=2third-party-advisory
- http://marc.info/?l=bugtraq&m=141383081521087&w=2third-party-advisory
- http://marc.info/?l=bugtraq&m=141383196021590&w=2third-party-advisory
- http://marc.info/?l=bugtraq&m=141383244821813&w=2third-party-advisory
- http://marc.info/?l=bugtraq&m=141383304022067&w=2third-party-advisory
- http://marc.info/?l=bugtraq&m=141383353622268&w=2third-party-advisory
- http://marc.info/?l=bugtraq&m=141383465822787&w=2third-party-advisory
- http://marc.info/?l=bugtraq&m=141450491804793&w=2third-party-advisory
- http://marc.info/?l=bugtraq&m=141577241923505&w=2third-party-advisory
The CVE record on cve.org NVD's entry
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