How severe is CVE-2026-9557?

CVE-2026-9557 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-9557 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-9557?

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

Does CVE-2026-9557 have an EU (EUVD) identifier?

Yes. CVE-2026-9557 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33273.

When was CVE-2026-9557 published?

CVE-2026-9557 was published on 2026-05-29 and last updated on 2026-06-17.

CVE-2026-9557

CVE-2026-9557 is a medium-severity vulnerability with a CVSS 3.x base score of 6.4. 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-918.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33273
Weakness: CWE-918
Published: 2026-05-29
Last modified: 2026-06-17

Description

A Server-Side Request Forgery (SSRF) vulnerability exists in Mautic's Focus component. Due to insufficient validation of user-supplied URLs, an authenticated user can trigger outbound HTTP requests from the hosting server, enabling internal network reconnaissance or forcing requests to arbitrary internal or external destinations.

Frequently asked questions

What is CVE-2026-9557?: A Server-Side Request Forgery (SSRF) vulnerability exists in Mautic's Focus component. Due to insufficient validation of user-supplied URLs, an authenticated user can trigger outbound HTTP requests from the hosting server, enabling internal network reconnaissance or forcing requests to arbitrary internal or external destinations.
How severe is CVE-2026-9557?: CVE-2026-9557 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-9557 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-9557?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-9557 have an EU (EUVD) identifier?: Yes. CVE-2026-9557 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33273.
When was CVE-2026-9557 published?: CVE-2026-9557 was published on 2026-05-29 and last updated on 2026-06-17.

References

https://github.com/mautic/mautic/security/advisories/GHSA-jmv8-8j9j-rcpc

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