Bug 2510719 (CVE-2026-69153) - CVE-2026-69153 postcss: PostCSS: Information disclosure via crafted sourceMappingURL
Summary: CVE-2026-69153 postcss: PostCSS: Information disclosure via crafted sourceMap...
Keywords:
Status: NEW
Alias: CVE-2026-69153
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-03 18:01 UTC by OSIDB Bzimport
Modified: 2026-08-25 10:24 UTC (History)
141 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:57590 0 None None None 2026-08-20 16:07:52 UTC

Description OSIDB Bzimport 2026-08-03 18:01:24 UTC 
PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Prior to 8.5.19, if from is unset, an attacker can cause PreviousMap.loadFile() to read an unintended source-map file by supplying an absolute or directory-traversal sourceMappingURL. The resulting map’s sources and sourcesContent may then be exposed to the application. This issue is fixed in version 8.5.19.
Comment 2 errata-xmlrpc 2026-08-20 16:07:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:57590 https://access.redhat.com/errata/RHSA-2026:57590
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