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CVE-2019-15892

27
FAUCET Score

CVE-2019-15892 is a Denial of Service vulnerability affecting Varnish Cache versions prior to 6.0.4 LTS, and 6.1.x and 6.2.x before 6.2.1. A remote attacker can trigger an assert and force an automatic restart with a clean cache by sending specially crafted HTTP/1 requests, leading to service disruption. This vulnerability has a CVSS score of 7.5 (High), indicating it can be exploited over the network with low attack complexity and no user interaction, resulting in high availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.0.0, < 6.0.4CPE matchmatch criteria
cpe:2.3:a:varnish-software:varnish_cache:*:*:*:*:lts:*:*:*
>= 6.1.0, <= 6.1.1CPE matchmatch criteria
cpe:2.3:a:varnish_cache_project:varnish_cache:*:*:*:*:*:*:*:*
>= 6.2.0, < 6.2.1CPE matchmatch criteria
cpe:2.3:a:varnish_cache_project:varnish_cache:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.79%
Probability of exploitation in next 30 days
EPSS Percentile
92.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0579 is in the 87th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (10)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: varnish:6-8030020200530080205.30b713e6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-varnish6-0:4.1-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-varnish6-varnish-0:6.0.6-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-varnish6-varnish-modules-0:0.15.0-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-varnish6-0:4.1-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-varnish6-varnish-0:6.0.6-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-varnish6-varnish-modules-0:0.15.0-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-varnish6-0:4.1-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-varnish6-varnish-0:6.0.6-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-varnish6-varnish-modules-0:0.15.0-6.el7
View patch

Vendor Advisories (1)

redhatCVE-2019-15892Moderate

varnish: denial of service handling certain crafted HTTP/1 requests

Sep 3, 2019

References

lists.opensuse.org / opensuse-security-announce/2019-09/msg00069.html
lists.opensuse.org / opensuse-security-announce/2019-09/msg00089.html
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/3OEOCYRU43TWEU2C65F3D6GK64MSWNNK
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/DBAQF6UDRSTURGINIMSMLJR4PTDYWA7C
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/KLSF54TDJWJLINIFEW5V5BKDNY5EQRR3
seclists.org / bugtraq/2019/Sep/5
Mailing ListThird Party Advisory
varnish-cache.org / security/VSV00003.html
Vendor Advisory
debian.org / security/2019/dsa-4514
Third Party Advisory