CVE-2025-11021

HIGH
MEDIUM Priority: 0.05 BB Relevance: 75/100
Published: 2025-09-26 Modified: 2026-11-04 First seen: 2026-11-04 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: None
A: None

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
— — 0

References & Advisories (16)

https://access.redhat.com/errata/RHSA-2025:18183
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:19713
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:19714
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:20959
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21032
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21655
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21656
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21657
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21664
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21665
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21666
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21772
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:22013
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2399627
issue-tracking x_refsource_REDHAT

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploitation Probability

0.64%
Raw Score 0.006360
Percentile 51.1%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00636
2026-11-13
0.00636
2026-11-12
0.00636
2026-11-10
0.00636
2026-11-09
0.00636
2026-11-08
0.00636
2026-11-07
0.00636
2026-11-06
0.00636
2026-11-05
0.00636
2026-11-04
0.00636

Intelligence Sources

mitre ref →
nvd ref →