CVE-2026-27601

Underscore.js has unlimited recursion in _.flatten and _.isEqual, potential for DoS attack

CVE-2026-27601 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-27601, released March 3, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.5

Important

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0106

65th percentile

underscore: DoS via stack overflow due to missing depth limits in `_.flatten` and `_.isEqual`

Where it's fixed

Product	Fixed in	Fix	Released
Linux
agama-web-ui · opensuse-leap 16.0	17+673.b97ba64d6-160000.12.1	OPENSUSE-SU-2026:21448-1	Jul 27, 2026
underscore · Debian 14	1.13.8~dfsg+~1.13.0-1	DEBIAN-CVE-2026-27601	Mar 3, 2026

Details

Published
March 3, 2026
Weakness
Allocation of Resources Without Limits or Throttling
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27601

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