Critical
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-17266
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:22 UTC · Revision 1
Source evidence
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.
osv:CVE-2019-17266
Complete source record
{
"id": "227651297354a71746a623bb0b35510bccb5f3935312cb5dffa1a1b996a60ef9",
"url": "https://osv.dev/vulnerability/CVE-2019-17266",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-17266",
"summary": "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.",
"evidence": "osv:CVE-2019-17266",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2019-17266",
"aliases": [
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"metrics": [
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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"affected": [
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"versions": [
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{
"fixed": "2.66.4"
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"source": "CPE_RANGE"
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{
"range": [
{
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],
"source": "REFERENCES_COMMIT"
},
{
"range": [
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"source": "REFERENCES_COMMIT"
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"versions": [
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"database_specific": {
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"vanir_signatures": [
{
"id": "CVE-2019-17266-5fb3d2ee",
"digest": {
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"source": "https://gitlab.gnome.org/gnome/libsoup@88b7dff4467f4151afae244ea7d1223753cd05ab",
"target": {
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{
"id": "CVE-2019-17266-7aac81ba",
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"source": "https://gitlab.gnome.org/gnome/libsoup@f8a54ac85eec2008c85393f331cdd251af8266ad",
"target": {
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{
"id": "CVE-2019-17266-88394bd3",
"digest": {
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"source": "https://gitlab.gnome.org/gnome/libsoup@88b7dff4467f4151afae244ea7d1223753cd05ab",
"target": {
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"function": "soup_ntlm_parse_challenge"
},
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"signature_type": "Function",
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{
"id": "CVE-2019-17266-9543589d",
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"source": "https://gitlab.gnome.org/gnome/libsoup@f8a54ac85eec2008c85393f331cdd251af8266ad",
"target": {
"file": "libsoup/soup-auth-ntlm.c",
"function": "soup_ntlm_parse_challenge"
},
"deprecated": false,
"signature_type": "Function",
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],
"vanir_signatures_modified": "2026-10-24T14:19:56Z"
}
}
],
"modified": "2026-10-24T14:19:56.073700397Z",
"provider": "osv",
"references": [
"https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1705054.html",
"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941912",
"https://github.com/Kirin-say/Vulnerabilities/blob/master/CVE-2019-17266_POC.md",
"https://gitlab.gnome.org/GNOME/libsoup/commit/88b7dff4467f4151afae244ea7d1223753cd05ab",
"https://gitlab.gnome.org/GNOME/libsoup/commit/f8a54ac85eec2008c85393f331cdd251af8266ad",
"https://security-tracker.debian.org/tracker/CVE-2019-17266",
"https://usn.ubuntu.com/4152-1/",
"https://gitlab.gnome.org/GNOME/libsoup/issues/173"
],
"provider_metadata": {
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"vendor_product": "canonical:ubuntu_linux",
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{
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"source": "CPE_STRING"
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},
"related_cves": [
{
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"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 443506,
"published_at": "2019-10-06T22:15:10.367+00:00"
}