How severe is CVE-2026-31817?

CVE-2026-31817 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.

Is CVE-2026-31817 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-31817?

CVE-2026-31817 affects Olivetin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-31817?

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-2026-31817 have an EU (EUVD) identifier?

Yes. CVE-2026-31817 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10910.

When was CVE-2026-31817 published?

CVE-2026-31817 was published on 2026-03-10 and last updated on 2026-06-17.

CVE-2026-31817

CVE-2026-31817 is a high-severity vulnerability in Olivetin with a CVSS 3.x base score of 8.5. 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-22.

Key facts

Severity: High (CVSS 3.x base score 8.5)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10910
Weakness: CWE-22
Affected product: Olivetin
Published: 2026-03-10
Last modified: 2026-06-17

Description

OliveTin gives access to predefined shell commands from a web interface. Prior to 3000.11.2, when the saveLogs feature is enabled, OliveTin persists execution log entries to disk. The filename used for these log files is constructed in part from the user-supplied UniqueTrackingId field in the StartAction API request. This value is not validated or sanitized before being used in a file path, allowing an attacker to use directory traversal sequences (e.g., ../../../) to write files to arbitrary locations on the filesystem. This vulnerability is fixed in 3000.11.2.

Frequently asked questions

What is CVE-2026-31817?: OliveTin gives access to predefined shell commands from a web interface. Prior to 3000.11.2, when the saveLogs feature is enabled, OliveTin persists execution log entries to disk. The filename used for these log files is constructed in part from the user-supplied UniqueTrackingId field in the StartAction API request. This value is not validated or sanitized before being used in a file path, allowing an attacker to use directory traversal sequences (e.g., ../../../) to write files to arbitrary locations on the filesystem. This vulnerability is fixed in 3000.11.2.
How severe is CVE-2026-31817?: CVE-2026-31817 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.
Is CVE-2026-31817 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-31817?: CVE-2026-31817 affects Olivetin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-31817?: 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-2026-31817 have an EU (EUVD) identifier?: Yes. CVE-2026-31817 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10910.
When was CVE-2026-31817 published?: CVE-2026-31817 was published on 2026-03-10 and last updated on 2026-06-17.

References

https://github.com/OliveTin/OliveTin/security/advisories/GHSA-364q-w7vh-vhpc

Affected products (1)

cpe:2.3:a:olivetin:olivetin:*:*:*:*:*:*:*:*

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