How severe is CVE-2022-34009?

CVE-2022-34009 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-34009 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-34009?

CVE-2022-34009 affects Fossil-scm Fossil. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-34009?

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

When was CVE-2022-34009 published?

CVE-2022-34009 was published on 2022-07-28 and last updated on 2026-06-17.

CVE-2022-34009

CVE-2022-34009 is a medium-severity vulnerability in Fossil-scm Fossil with a CVSS 3.x base score of 5.5. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Fossil-scm Fossil
Published: 2022-07-28
Last modified: 2026-06-17

Description

Fossil 2.18 on Windows allows attackers to cause a denial of service (daemon crash) via an XSS payload in a ticket. This occurs because the ticket data is stored in a temporary file, and the product does not properly handle the absence of this file after Windows Defender has flagged it as malware.

Frequently asked questions

What is CVE-2022-34009?: Fossil 2.18 on Windows allows attackers to cause a denial of service (daemon crash) via an XSS payload in a ticket. This occurs because the ticket data is stored in a temporary file, and the product does not properly handle the absence of this file after Windows Defender has flagged it as malware.
How severe is CVE-2022-34009?: CVE-2022-34009 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-34009 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-34009?: CVE-2022-34009 affects Fossil-scm Fossil. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-34009?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-34009 published?: CVE-2022-34009 was published on 2022-07-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fossil-scm:fossil:2.18:*:*:*:*:*:*:*

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