How severe is CVE-2026-84718?

CVE-2026-84718 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-84718 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-84718?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-84718 published?

CVE-2026-84718 was published on 2026-09-23 and last updated on 2026-09-24.

CVE-2026-84718

CVE-2026-84718 is a medium-severity vulnerability with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-348.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-348
Published: 2026-09-23
Last modified: 2026-09-24

Description

A flaw was found in the Ansible Automation Platform automation-controller. In the shipped production configuration, the Controller trusts the client-supplied X-Forwarded-For header as the request's client IP without verifying that it originated from a trusted proxy, and selects the leftmost (attacker-controlled) header value. As a result, an attacker can forge the source IP address recorded for their requests in the Controller's audit and access logs, degrading the integrity of forensic and SIEM attribution. The flaw does not grant additional access.

Frequently asked questions

What is CVE-2026-84718?: A flaw was found in the Ansible Automation Platform automation-controller. In the shipped production configuration, the Controller trusts the client-supplied X-Forwarded-For header as the request's client IP without verifying that it originated from a trusted proxy, and selects the leftmost (attacker-controlled) header value. As a result, an attacker can forge the source IP address recorded for their requests in the Controller's audit and access logs, degrading the integrity of forensic and SIEM attribution. The flaw does not grant additional access.
How severe is CVE-2026-84718?: CVE-2026-84718 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-84718 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-84718?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-84718 published?: CVE-2026-84718 was published on 2026-09-23 and last updated on 2026-09-24.

References

Other CWE-348 vulnerabilities

CVE-2026-48772 — Critical (CVSS 10.0): ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL. In versions 2.0.0 through 3.0.8, the ProxySQL MySQL…
CVE-2026-97404 — Critical (CVSS 9.2): In OpenStack Zaqar before 22.0.2, WSGI transport mishandles the URL-Signature header. By sending a request with an…
CVE-2026-16272 — Critical (CVSS 9.1): Use of less trusted source vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos…
CVE-2026-58122 — Critical (CVSS 9.1): Hermes WebUI before 0.51.307 contains an authentication bypass vulnerability that allows unauthenticated remote…
CVE-2026-12249 — Critical (CVSS 9.0): An issue was discovered in Canonical ADSys upstream versions through v0.16.2. During Active Directory Certificate…
CVE-2025-69240 — High (CVSS 8.8): Raytha CMS allows an attacker to spoof `X-Forwarded-Host` or `Host` headers to attacker controlled domain. The attacker…

Browse all CWE-348 vulnerabilities →