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CVE-2017-8807

32
FAUCET Score

CVE-2017-8807 is a critical information disclosure vulnerability affecting Varnish HTTP Cache versions 4.1.x before 4.1.9 and 5.x before 5.2.1, including various Debian distributions. It allows remote attackers to extract sensitive data from process memory due to an oversized buffer in specific transient object scenarios. With a CVSS score of 9.1 (Critical), this vulnerability is easily exploitable over the network with low attack complexity, leading to high confidentiality impact. While there is no evidence of active exploitation, nor publicly available exploit code in Metasploit or ExploitDB, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.1.0, < 4.1.9CPE matchmatch criteria
cpe:2.3:a:varnish-cache:varnish:*:*:*:*:*:*:*:*
>= 5.0.0, < 5.2.1CPE matchmatch criteria
cpe:2.3:a:varnish_cache_project:varnish_cache:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.08%
Probability of exploitation in next 30 days
EPSS Percentile
89.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0408 is in the 83rd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2017-8807Moderate

varnish: Data leak - ‘-sfile’ Stevedore transient objects

Nov 15, 2017

References

bugs.debian.org / 881808
Issue TrackingThird Party Advisory
github.com / varnishcache/varnish-cache/commit/176f8a075a963ffbfa56f1c460c15f6a1a6af5a7
PatchVendor Advisory
github.com / varnishcache/varnish-cache/pull/2429
Issue TrackingVendor Advisory
debian.org / security/2017/dsa-4034
Third Party Advisory
varnish-cache.org / security/VSV00002.html
PatchVendor Advisory
securityfocus.com / bid/101886
Third Party AdvisoryVDB Entry