CVE-2024-42482: fish-shop/syntax-check is a GitHub action for syntax checking fish shell files

Q: How do I fix CVE-2024-42482?

syntax-check: upgrade to 1.6.12. Exact commands for each OS are on this page.

Q: Is CVE-2024-42482 being exploited?

CVE-2024-42482 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-42482 affect?

CVE-2024-42482 affects syntax-check. Severity is medium (CVSS 4.8). fish-shop/syntax-check is a GitHub action for syntax checking fish shell files. Improper neutralization of delimiters in the `pattern` input (specifically the command separator `;` and command substitution characters `(` and `)`) mean that

Q: How urgent is CVE-2024-42482?

Priority 36/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 4.8REMOTEUPGRADE

CVE-2024-42482 is a medium-severity flaw (CVSS 4.8) affecting syntax-check. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

fish-shop/syntax-check is a GitHub action for syntax checking fish shell files. Improper neutralization of delimiters in the `pattern` input (specifically the command separator `;` and command substitution characters `(` and `)`) mean that arbitrary command injection is possible by modification of the input value used in a workflow. This has the potential for exposure or exfiltration of sensitive information from the workflow runner, such as migh

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-140
Published	2024-08-12
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: fish-shop

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

Am I affected?

Timeline

2024-08-12 16:15 UTCPublished CVE record published
2026-06-17 07:49 UTCUpdated Record last modified

fish-shop syntax-check UPGRADE

Affected: < 1.6.12

Fixed in: 1.6.12

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy syntax-check || rpm -q syntax-check || syntax-check --version

2. UPGRADE to 1.6.12 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade syntax-check

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade syntax-check

Note

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

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-2024-42482?

syntax-check: upgrade to 1.6.12. Exact commands for each OS are on this page.

Is CVE-2024-42482 being exploited?

CVE-2024-42482 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-2024-42482 affect?

CVE-2024-42482 affects syntax-check. Severity is medium (CVSS 4.8). fish-shop/syntax-check is a GitHub action for syntax checking fish shell files. Improper neutralization of delimiters in the `pattern` input (specifically the command separator `;` and command substitution characters `(` and `)`) mean that

How urgent is CVE-2024-42482?

Priority 36/100. Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities

References

← Back to latest CVEs