Bash vulnerabilitiesAnd the versions its exploited flaws hit.
Bash is made by Gnu. We track 18 published vulnerabilities in it, across 39 versions. 3 of them are on the list of flaws known to be exploited, the newest added on 2 October 2025. If you run Bash, check your version against the exploited flaws below and patch those first.
The most recent Bash flaw added to the known-exploited list is CVE-2014-6278, on 2 October 2025. We keep watching the known-exploited list.
Which versions of Bash do the exploited flaws hit?
Each exploited flaw lists the versions it affects, as published by the vendor. Find your version, then patch.
- CVE-2014-6278Exploited list, 2 Oct 2025
GNU Bash OS Command Injection Vulnerability
1.14.01.14.11.14.21.14.31.14.41.14.51.14.61.14.7 - CVE-2014-6271Exploited list, 28 Jan 2022
GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability
up to 4.3 - CVE-2014-7169Exploited list, 28 Jan 2022
GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability
up to 4.3
Which Bash vulnerabilities are being exploited?
3 flaws are on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 8.8GNU Bash OS Command Injection Vulnerability
GNU Bash contains an OS command injection vulnerability which allows remote attackers to execute arbitrary commands via a crafted environment.
- 9.8GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability
GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute code.
- 9.8GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability
GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute code.
Which Bash flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- >99%
GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code via a crafted environment, as demonstrated by...
- >99%
GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variables, which allows remote attackers to write to files or possibly have unknown...
- >99%
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...
- 64%CVE-2014-7186Critical
The redirection implementation in parse.y in GNU Bash through 4.3 bash43-026 allows remote attackers to cause a denial of service (out-of-bounds array access and application crash) or possibly have unspecified other...
- 64%CVE-2014-6277Critical
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 code or cause a denial of service (uninitialized...
- 58%CVE-2014-7187Critical
Off-by-one error in the read_token_word function in parse.y in GNU Bash through 4.3 bash43-026 allows remote attackers to cause a denial of service (out-of-bounds array access and application crash) or possibly have...
- 6.0%CVE-2016-0634High
The expansion of '\h' in the prompt string in bash 4.3 allows remote authenticated users to execute arbitrary code via shell metacharacters placed in 'hostname' of a machine.
- 2.6%CVE-2019-18276High
An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11.
- 0.9%CVE-1999-0491Medium
The prompt parsing in bash allows a local user to execute commands as another user by creating a directory with the name of the command to execute.
- 0.7%
The /etc/profile.d/60alias.sh script in the Mandriva bash package for Bash 2.05b, 3.0, 3.2, 3.2.48, and 4.0 enables the --show-control-chars option in LS_OPTIONS, which allows local users to send escape sequences to...
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1 flaw being exploited affects software Acme tracks
GNU Bash contains an OS command injection vulnerability which allows remote attackers to execute arbitrary commands via a crafted environment.
- Matched to
- Bash on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 18 published vulnerabilities listed under the name Bash, across 39 versions. The most recent Bash flaw added to the known-exploited list is CVE-2014-6278, on 2 October 2025.
3 are on the list of flaws known to be exploited. The most recently added are CVE-2014-6278, CVE-2014-6271 and CVE-2014-7169.
Each flaw names its own versions, usually as ranges. The newest, CVE-2014-6278, affects 1.14.0, 1.14.1, 1.14.2, 1.14.3 and more. The versions for every exploited flaw are listed on this page.
Create a Precursor Intelligence account and track Bash. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.