CVE-2019-17266

CRITICALNVD 9.89.8—

9.8

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.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 76.6%
KEV: Not listed

Published

October 6, 2019

Last Modified

November 21, 2024

References (16)

cve@mitrehttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941912
cve@mitrehttps://github.com/Kirin-say/Vulnerabilities/blob/master/CVE-2019-17266_POC.md
cve@mitrehttps://gitlab.gnome.org/GNOME/libsoup/commit/88b7dff4467f4151afae244ea7d1223753cd05ab
cve@mitrehttps://gitlab.gnome.org/GNOME/libsoup/commit/f8a54ac85eec2008c85393f331cdd251af8266ad
cve@mitrehttps://gitlab.gnome.org/GNOME/libsoup/issues/173
cve@mitrehttps://security-tracker.debian.org/tracker/CVE-2019-17266
cve@mitrehttps://usn.ubuntu.com/4152-1/
cve@mitrehttps://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1705054.html
af854a3a-2127-422b-91ae-364da2661108https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941912
af854a3a-2127-422b-91ae-364da2661108https://github.com/Kirin-say/Vulnerabilities/blob/master/CVE-2019-17266_POC.md
af854a3a-2127-422b-91ae-364da2661108https://gitlab.gnome.org/GNOME/libsoup/commit/88b7dff4467f4151afae244ea7d1223753cd05ab
af854a3a-2127-422b-91ae-364da2661108https://gitlab.gnome.org/GNOME/libsoup/commit/f8a54ac85eec2008c85393f331cdd251af8266ad
af854a3a-2127-422b-91ae-364da2661108https://gitlab.gnome.org/GNOME/libsoup/issues/173
af854a3a-2127-422b-91ae-364da2661108https://security-tracker.debian.org/tracker/CVE-2019-17266
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4152-1/

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	libsoup2.4-doc (2.66.1-1ubuntu0.1) @ disco	2026-05-27	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-125Out-of-bounds Read

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

UbuntuUSN-4152-1MEDIUM
libsoup vulnerability

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 06:08 UTCepss_batch
2026-06-05 06:08 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:23 UTCEG score recompute
2026-05-27 13:23 UTCVendor advisory
2026-05-27 13:23 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch

Frequently asked(5)

What is CVE-2019-17266?

CVE-2019-17266 is a critical vulnerability published on October 6, 2019. libsoup from versions 2.65.1 until 2.68.1 have a heap-based buffer over-read because soupntlmparse_challenge() in soup-auth-ntlm.c does not properly check an NTLM message's length before proceeding with a memcpy.

When was CVE-2019-17266 disclosed?

CVE-2019-17266 was first published in the National Vulnerability Database on October 6, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-17266 actively exploited?

CVE-2019-17266 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 76.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-17266?

CVE-2019-17266 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2019-17266?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-17266, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2019-17266

Published

Last Modified

References (16)

Patch Availability(1)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-17266?

Same vendor

Same CWE

CVE-2019-17266

📅 Published

🔄 Last Modified

🔗 References (16)

Patch Availability(1)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-17266?

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References (16)

Frequently asked(5)

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