Security Update for libxslt: Mitigating Sensitive Information Disclosure

libxslt Updated 03 Apr 2026

Summary

31/03/2026
N/A
Yes i
Unrated
Not published

ALSA-2026:6266: Moderate: libxslt security update. Affects libxslt versions < 1.1.34-14.el9_7.1. Fixed in 1.1.34-14.el9_7.1. How to fix ↓

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Background

libxslt is a widely-used library designed for transforming XML files into various textual formats, including HTML and plain text, through the XSLT stylesheet transformation mechanism. It is integral to many applications that require XML processing. However, vulnerabilities in this library can lead to significant security risks, particularly in web content processing, where sensitive information may be inadvertently exposed.

Vulnerability Detail

The vulnerability identified as CVE-2023-40403 affects libxslt, allowing for the potential disclosure of sensitive information when processing web content. This issue arises from improper handling of certain XML data, which could be exploited by attackers to access confidential information that should remain protected. The ramifications of this vulnerability could include unauthorized access to user data, leading to privacy breaches and potential exploitation.

How To Fix

Minimum fixed version

1.1.34-14.el9_7.1

This is the first release that contains the fix.

sudo dnf update libxslt

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Workaround

Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the security update as soon as it is available.

Conclusion

In summary, the libxslt library has a moderate security vulnerability (CVE-2023-40403) that can lead to the disclosure of sensitive information. It is vital to update to the latest patched version to safeguard your applications. Regular monitoring and updates are essential to maintain security.

See every vulnerability recorded for libxslt →

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FAQ

CVE-2023-40403 is a security vulnerability in the libxslt library that may lead to the disclosure of sensitive information when processing web content.

You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.

The potential impacts include unauthorized access to sensitive user data, privacy breaches, and exploitation of the information disclosed.

Yes, a patch is available. You should update to version 1.1.34-14.el9_7.1 of libxslt and libxslt-devel to mitigate the vulnerability.

While there are no specific workarounds, it is crucial to prioritize updating the package to protect against potential exploitation.

Related vulnerabilities

Recent vulnerabilities recorded for libxslt.

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How To Fix

Minimum fixed version

1.1.34-14.el9_7.1

This is the first release that contains the fix.

sudo dnf update libxslt

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