How severe is CVE-2026-50878?

CVE-2026-50878 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-50878 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-50878?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-50878 have an EU (EUVD) identifier?

Yes. CVE-2026-50878 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36776.

When was CVE-2026-50878 published?

CVE-2026-50878 was published on 2026-06-15 and last updated on 2026-06-17.

CVE-2026-50878

CVE-2026-50878 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36776
Weakness: CWE-400
Published: 2026-06-15
Last modified: 2026-06-17

Description

An issue in the attachment handling component of Feuerhamster MailForm v1.1.0 allows attackers to cause a Denial of Service (DoS) via a crafted request.

Frequently asked questions

What is CVE-2026-50878?: An issue in the attachment handling component of Feuerhamster MailForm v1.1.0 allows attackers to cause a Denial of Service (DoS) via a crafted request.
How severe is CVE-2026-50878?: CVE-2026-50878 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-50878 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-50878?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-50878 have an EU (EUVD) identifier?: Yes. CVE-2026-50878 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36776.
When was CVE-2026-50878 published?: CVE-2026-50878 was published on 2026-06-15 and last updated on 2026-06-17.

References

https://gist.github.com/pyuysig/d4c2ace69162c82f1df197ce0f45d63f

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