CVE-2018-11469

Incorrect caching of responses to requests including an Authorization header in HAProxy 1.8.0 through 1.8.9 (if cache enabled) allows attackers to achieve information disclosure via an unauthenticated remote request, related to the proto_http.c check_request_for_cacheability function.

Published: 2018-05-25 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-11469 is rated Moderate Risk (56.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.06%). EPSS rose +3.03% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-11469

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.03% 3.06% +3.03%
2 2025-11-21 0.06% 0.03% -0.03%
3 2025-11-18 — 0.06% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-11469

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.0 MEDIUM
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2018-11469

OS Trackers for CVE-2018-11469

vendor priority summary link
debian not yet assigned CVE-2018-11469 not yet assigned priority: Debian including 1 source packages (haproxy), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-11469
redhat medium — https://access.redhat.com/security/cve/CVE-2018-11469
suse medium CVE-2018-11469 severity moderate: SUSE including 9 source package names (haproxy, haproxy-1.8.14~git0.52e4d43b-3.3.2, …), 15 product×package rows across 15 product lines (HPE Helion OpenStack 8, SUSE Linux Enterprise High Availability Extension 12 SP2, … (15 product lines)): Fixed 8, Known Not Affected 7. https://www.suse.com/security/cve/CVE-2018-11469/
ubuntu medium CVE-2018-11469 medium priority: Ubuntu including 1 source packages (haproxy), 5 status rows across 5 suites (artful, bionic, trusty, upstream, xenial): not-affected 2, DNE 1, needs-triage 1, released 1. https://ubuntu.com/security/CVE-2018-11469

Affected software / configurations for CVE-2018-11469

Vendor Product Version Raw CPE
haproxy haproxy >= 1.8.0, <= 1.8.9 cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

References for CVE-2018-11469

cvelogic Threat Intelligence