CVE-2014-2906: The psub function in fish (aka fish-shell) 1.16.0 before 2.1.1 does not properly create temporary files, which

Routine

HIGH 7.0UPGRADE

CVE-2014-2906 is a high-severity flaw (CVSS 7.0) affecting fish. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The psub function in fish (aka fish-shell) 1.16.0 before 2.1.1 does not properly create temporary files, which allows local users to execute arbitrary commands via a temporary file with a predictable name.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.0 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-362
Published	2020-01-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fishshell

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-01-28 16:15 UTCPublished CVE record published
2026-06-17 00:07 UTCUpdated Record last modified

fishshell fish UPGRADE

Affected: >= 1.16.0 and < 2.1.1

Fixed in: 2.1.1

Safe to downgrade to: a release before 1.16.0

1. Check installed version

apt-cache policy fish || rpm -q fish || fish --version

2. UPGRADE to 2.1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fish

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fish

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.16.0 (Debian / Ubuntu)

apt-cache madison fish sudo apt install fish=<VERSION_BEFORE_1.16.0> sudo apt-mark hold fish

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list fish sudo dnf downgrade fish-<VERSION_BEFORE_1.16.0> sudo dnf versionlock add fish

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2014-2906?

fish: upgrade to 2.1.1. Exact commands for each OS are on this page.

Is CVE-2014-2906 being exploited?

CVE-2014-2906 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2014-2906 affect?

CVE-2014-2906 affects fish. Severity is high (CVSS 7.0). The psub function in fish (aka fish-shell) 1.16.0 before 2.1.1 does not properly create temporary files, which allows local users to execute arbitrary commands via a temporary file with a predictable name.

How urgent is CVE-2014-2906?

Priority 31/100. High severity

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References

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