[Pkg-javascript-devel] Bug#1148404: node-postcss (node-source-map-js): CVE-2026-93749

[Salvatore Bonaccorso]

Source: node-postcss
Version: 8.5.26+~cs10.2.24-1
Severity: important
Tags: security upstream
Forwarded: https://github.com/7rulnik/source-map-js/issues/76
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for node-postcss.

CVE-2026-93749[0]:
| source-map-js through 1.2.1 fails to validate the per-section offset
| line value in indexed source maps, allowing attackers to specify
| arbitrary numeric values. Attackers can supply extremely large
| offset line values that cause synchronous event loop blocking for
| extended periods, preventing the service from handling other
| requests.

TTBOMK, no upstream fix exists yet at time of writing this bugreport.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-93749
    https://www.cve.org/CVERecord?id=CVE-2026-93749
[1] https://github.com/7rulnik/source-map-js/issues/76

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore