[Pkg-javascript-devel] Bug#1148407: node-deepmerge: CVE-2026-93753

[Salvatore Bonaccorso]

Source: node-deepmerge
Version: 4.3.1+~1.1.1-1
Severity: important
Tags: security upstream
Forwarded: https://github.com/TehShrike/deepmerge/issues/273
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for node-deepmerge.

CVE-2026-93753[0]:
| deepmerge through 4.3.1 contains a prototype poisoning vulnerability
| in the mergeObject() function that fails to properly validate keys
| being written to target objects. Attackers can supply malicious
| source objects in merge operations to inject attacker-controlled
| properties into the returned object's prototype, causing
| applications to inherit unintended values when accessing properties
| without own-property checks.


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-2026-93753
    https://www.cve.org/CVERecord?id=CVE-2026-93753
[1] https://github.com/TehShrike/deepmerge/issues/273

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore