CVE-2023-29401: The filename parameter of the Context.FileAttachment function is not properly sanitized

Routine

MEDIUM 4.3UPGRADE

CVE-2023-29401 is a medium-severity flaw (CVSS 4.3) affecting gin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The filename parameter of the Context.FileAttachment function is not properly sanitized. A maliciously crafted filename can cause the Content-Disposition header to be sent with an unexpected filename value or otherwise modify the Content-Disposition header. For example, a filename of "setup.bat";x=.txt" will be sent as a file named "setup.bat". If the FileAttachment function is called with names provided by an untrusted source, this may perm

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-494
Published	2023-06-08
Last modified	2026-06-17

Publisher (CNA): Go Project · Vendor: gin-gonic

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

Am I affected?

Timeline

2023-06-08 21:15 UTCPublished CVE record published
2026-06-17 05:49 UTCUpdated Record last modified

gin-gonic gin UPGRADE

Affected: >= 1.3.1-0.20190301021747-ccb9e902956d and < 1.9.1

Fixed in: 1.9.1

Safe to downgrade to: a release before 1.3.1-0.20190301021747-ccb9e902956d

1. Check installed version

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

2. UPGRADE to 1.9.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gin

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 1.3.1-0.20190301021747-ccb9e902956d (Debian / Ubuntu)

apt-cache madison gin sudo apt install gin=<VERSION_BEFORE_1.3.1-0.20190301021747-ccb9e902956d> sudo apt-mark hold gin

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

dnf --showduplicates list gin sudo dnf downgrade gin-<VERSION_BEFORE_1.3.1-0.20190301021747-ccb9e902956d> sudo dnf versionlock add gin

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-2023-29401?

gin: upgrade to 1.9.1. Exact commands for each OS are on this page.

Is CVE-2023-29401 being exploited?

CVE-2023-29401 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-2023-29401 affect?

CVE-2023-29401 affects gin. Severity is medium (CVSS 4.3). The filename parameter of the Context.FileAttachment function is not properly sanitized. A maliciously crafted filename can cause the Content-Disposition header to be sent with an unexpected filename value or otherwise modify the Content-Di

How urgent is CVE-2023-29401?

Priority 30/100. Public exploit reference

Related CVEs

CVE-2023-31873 HIGH 7.8 DOWNGRADE Gin 0.7.4 allows execution of arbitrary code when a crafted file is opened, e.g., via require('child_process')
CVE-2023-26125 MEDIUM 5.6 UPGRADE Versions of the package github.com/gin-gonic/gin before 1.9.0 are vulnerable to Improper Input Validation by a
CVE-2020-36567 HIGH 7.5 UPGRADE Unsanitized input in the default logger in github.com/gin-gonic/gin before v1.6.0 allows remote attackers to i

References

← Back to latest CVEs