CVE-2026-4271

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.83% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 54.9% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-17 11:14Z5 MO AGO

Last updated

2026-05-19 21:30Z3 MO AGO

Reserved

2026-03-16

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.2

Document digest

0dd9caaa1a3655b9b0f7bede748ede4bfe26add7a571c9fd37d450e035ed45fa

• access.redhat.comRHSA-2026:15968https://access.redhat.com/errata/RHSA-2026:15968vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:17482https://access.redhat.com/errata/RHSA-2026:17482vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:19143https://access.redhat.com/errata/RHSA-2026:19143vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-4271vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2448044https://bugzilla.redhat.com/show_bug.cgi?id=2448044issue-trackingx_refsource_REDHAT
• gitlab.gnome.orghttps://gitlab.gnome.org/GNOME/libsoup/-/issues/496