CVE-2026-39401
CVE-2026-39401 is a medium-severity vulnerability in Cronicle with a CVSS 3.x base score of 5.4. 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-862.
Key facts
- Severity: Medium (CVSS 3.x base score 5.4)
- CVSS v4: 5.3
- EPSS exploit prediction: 0% (8th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-19925
- Weakness: CWE-862
- Affected product: Cronicle
- Published:
- Last modified:
Description
Cronicle is a multi-server task scheduler and runner, with a web based front-end UI. Prior to 0.9.111, jb child processes can include an update_event key in their JSON output. The server applies this directly to the parent event's stored configuration without any authorization check. A low-privilege user who can create and run events can modify any event property, including webhook URLs and notification emails. This vulnerability is fixed in 0.9.111.
Frequently asked questions
- What is CVE-2026-39401?
- Cronicle is a multi-server task scheduler and runner, with a web based front-end UI. Prior to 0.9.111, jb child processes can include an update_event key in their JSON output. The server applies this directly to the parent event's stored configuration without any authorization check. A low-privilege user who can create and run events can modify any event property, including webhook URLs and notification emails. This vulnerability is fixed in 0.9.111.
- How severe is CVE-2026-39401?
- CVE-2026-39401 has a CVSS 3.x base score of 5.4, 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-2026-39401 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-39401?
- CVE-2026-39401 affects Cronicle. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-39401?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-39401 have an EU (EUVD) identifier?
- Yes. CVE-2026-39401 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19925.
- When was CVE-2026-39401 published?
- CVE-2026-39401 was published on 2026-04-07 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:cronicle:cronicle:*:*:*:*:*:*:*:*
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