CVE-2025-11021: A flaw was found in the cookie date handling logic of the libsoup HTTP library, widely used by GNOME and other applications for web communication. When…

PriorityP346high7.5CVSS 3.1

AVNACLPRNUINSUCHINAN

EPSS

0.59%

44.3th percentile

A flaw was found in the cookie date handling logic of the libsoup HTTP library, widely used by GNOME and other applications for web communication. When processing cookies with specially crafted expiration dates, the library may perform an out-of-bounds memory read. This flaw could result in unintended disclosure of memory contents, potentially exposing sensitive information from the process using libsoup.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
debian	libsoup3	< libsoup3 3.6.5-5 (forky)	libsoup3 3.6.5-5 (forky)
msrc	azl3_libsoup_3.4.4-9_on_azure_linux_3.0	—	—
msrc	cbl2_libsoup_3.0.4-10_on_cbl_mariner_2.0	—	—
msrc	cbl2_libsoup_3.0.4-9_on_cbl_mariner_2.0	—	—

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

osv7.5HIGH

vendor_debian7.5HIGH

vendor_msrc7.5HIGH

vendor_redhat7.5HIGH

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.