VulnerabilityPublished 29 May 2026

CVE-2026-9557: mautic · Server-Side Request Forgery (SSRF)

Affects mauticSource CVE Database V5

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Not known to be exploited · CVSS 6.4 Medium · fixed in 7.1.2 : update mautic when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

6.4Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 7.1.2, 6.0.9, 5.2.11 +1

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 29 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade mautic/core to 7.1.2, 6.0.9, 5.2.11 or 4.4.20.

Affected software

Product	Affected	Fixed in
GitHubmautic/mautic`pkg:github/mautic/mautic`Other threats	Affected 4.0.0 – 7.0.0 4 affected builds	Fixed in–
Packagistmautic/core`pkg:composer/mautic/core`Other threats	Affected >=4.0.0 <4.4.20 >=5.0.0 <5.2.11 >=6.0.0 <6.0.9 >=7.0.0 <7.1.2	Fixed in 4.4.20 5.2.11 6.0.9 7.1.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, restrict authenticated user privileges to trusted users only and monitor for unusual outbound requests from the server. Avoid exposing sensitive internal services that could be targeted via SSRF.

Description

CVE-2026-9557 is a Server-Side Request Forgery (SSRF) vulnerability in Mautic's Focus component. It allows an authenticated user to cause the hosting server to make HTTP requests to arbitrary internal or external destinations due to insufficient validation of user-supplied URLs. This can enable internal network reconnaissance or interaction with unintended network resources. The vulnerability affects specific versions 4.0.0, 5.0.0, 6.0.0, and 7.0.0 of Mautic. The CVSS score is 6.4, indicating a medium severity level.

Impact

An authenticated user can leverage this SSRF vulnerability to make the Mautic server send HTTP requests to arbitrary locations. This may allow attackers to map internal network topology or access internal services not otherwise reachable externally. The confidentiality and integrity of internal network resources could be impacted, but there is no indication of direct denial of service or remote code execution from this vulnerability alone.

Summary

CVE-2026-9557 is a medium severity SSRF vulnerability (CWE-918) in Mautic's Focus component. Authenticated users can supply URLs that are insufficiently validated, causing the server to perform outbound HTTP requests to arbitrary destinations. This behavior can be exploited to conduct internal network reconnaissance or to interact with internal or external systems that the server can reach. The vulnerability affects Mautic versions 4.0.0, 5.0.0, 6.0.0, and 7.0.0.

CWE-918Server-Side Request Forgery (opens in a new tab)
Base weaknessCWE Top 25 (2025): #22OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
Implementation · Operation
If there is a known list of applications, IP, hostname, and/or domains to which the product is allowed to communicate, then use allowlists to ensure that outgoing requests are restricted to these known entities. The allowlists could be in the application code or possibly enforced by firewalls or network segmentation.
Implementation · Operation
If the product is expected to be able to connect to arbitrary IP addresses or domains, consider using a denylist that includes private network addresses, internal domain names, etc. The denylist could be in the application code or possibly enforced by firewalls or network segmentation.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
OWASP Cheat Sheets
Server Side Request Forgery Prevention (opens in a new tab)
Unvalidated Redirects and Forwards (opens in a new tab)
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V12.6.1 (opens in a new tab)
V5.2.6 (opens in a new tab)
Attack patterns
Server Side Request Forgery (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

github.com/mautic/mautic/security/advisories/GHSA-jmv8-8j9j-rcpc (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 2 Jul 2026, 23:10 UTC

WeaknessesCWE-918

Technical details

References

Community reviews

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