What is CVE-2018-12910?

CVE-2018-12910 is a critical-severity vulnerability in GNOME Libsoup, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2018-07-05.

How severe is CVE-2018-12910?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Out-of-bounds Read in GNOME Libsoup

CVE-2018-12910

The get_cookies function in soup-cookie-jar.c in libsoup 2.63.2 allows attackers to have unspecified impact via an empty hostname.

Vulnerability class: Buffer Overflow

Published 2018-07-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.042 (90.9th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.042 · newest: 0.042 · change: 0.000

Affected products

GNOME Libsoup — versions 2.63.2
Canonical Ubuntu Linux — versions 14.04, 16.04, 17.10
Debian Linux — versions 8.0, 9.0
openSUSE Leap — versions 15.0
Red Hat Ansible Tower — versions 3.3
Red Hat Enterprise Linux Desktop — versions 7.0
Red Hat Enterprise Linux Server — versions 7.0
Red Hat Enterprise Linux Workstation — versions 7.0
Red Hat Openshift Container Platform — versions 3.11

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
gitlab.gnome.org/GNOME/libsoup/issues/3 (Third Party Advisory)
access.redhat.com/errata/RHSA-2018:3505 (vendor-advisory, Third Party Advisory)
www.debian.org/security/2018/dsa-4241 (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2018/07/msg00007.html (mailing-list, Mailing List, Third Party Advisory)
usn.ubuntu.com/3701-1/ (vendor-advisory, Third Party Advisory)
access.redhat.com/errata/RHSA-2018:3140 (vendor-advisory, Third Party Advisory)
gitlab.gnome.org/GNOME/gnome-sdk-images/commit/4215b8a21b3b3055e947312a8920df94… (Patch, Third Party Advisory)
gitlab.gnome.org/GNOME/libsoup/commit/db2b0d5809d5f8226d47312b40992cadbcde439f (Patch, Third Party Advisory, Vendor Advisory)
access.redhat.com/errata/RHBA-2019:0327 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2018-12910?: CVE-2018-12910 is a critical-severity vulnerability in GNOME Libsoup, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2018-07-05.
How severe is CVE-2018-12910?: Critical severity. CVSS v3 base score is 9.8 out of 10.