CVE-2019-17266

Name: CVE-2019-17266
Creator: NVD / NIST
Published: 2019-10-06T22:15:10.367+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.78%

Last modified Jun 17, 2026

CVE-2019-17266 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. libsoup from versions 2.65.1 until 2.68.1 have a heap-based buffer over-read because soup_ntlm_parse_challenge() in soup-auth-ntlm.c does not properly check an NTLM message's length before proceeding with a memcpy.. EPSS estimates a 2.78% chance of exploitation in the next 30 days.

Description

libsoup from versions 2.65.1 until 2.68.1 have a heap-based buffer over-read because soup_ntlm_parse_challenge() in soup-auth-ntlm.c does not properly check an NTLM message's length before proceeding with a memcpy.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.78%

84.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Gnome	Libsoup	>= 2.65.1, < 2.66.4
Gnome	Libsoup	>= 2.67.1, <= 2.68.1
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.04

References

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941912Third Party Advisory
https://github.com/Kirin-say/Vulnerabilities/blob/master/CVE-2019-17266_POC.mdThird Party Advisory
https://gitlab.gnome.org/GNOME/libsoup/commit/88b7dff4467f4151afae244ea7d1223753cd05abThird Party Advisory
https://gitlab.gnome.org/GNOME/libsoup/commit/f8a54ac85eec2008c85393f331cdd251af8266adThird Party Advisory
https://gitlab.gnome.org/GNOME/libsoup/issues/173Broken Link, Issue Tracking, Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2019-17266Third Party Advisory
https://usn.ubuntu.com/4152-1/Third Party Advisory
https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1705054.html
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941912Third Party Advisory
https://github.com/Kirin-say/Vulnerabilities/blob/master/CVE-2019-17266_POC.mdThird Party Advisory
https://gitlab.gnome.org/GNOME/libsoup/commit/88b7dff4467f4151afae244ea7d1223753cd05abThird Party Advisory
https://gitlab.gnome.org/GNOME/libsoup/commit/f8a54ac85eec2008c85393f331cdd251af8266adThird Party Advisory
https://gitlab.gnome.org/GNOME/libsoup/issues/173Broken Link, Issue Tracking, Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2019-17266Third Party Advisory
https://usn.ubuntu.com/4152-1/Third Party Advisory
https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1705054.html

Timeline

Published: Oct 6, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-17266?

How severe is CVE-2019-17266?

CVE-2019-17266 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.78% probability of exploitation in the next 30 days.

How do I fix CVE-2019-17266?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-17266?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST