How severe is CVE-2026-4308?

CVE-2026-4308 has a CVSS 3.x base score of 6.3, 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 low.

Is CVE-2026-4308 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4308?

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

Does CVE-2026-4308 have an EU (EUVD) identifier?

Yes. CVE-2026-4308 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12538.

When was CVE-2026-4308 published?

CVE-2026-4308 was published on 2026-03-17 and last updated on 2026-06-17.

CVE-2026-4308

CVE-2026-4308 is a medium-severity vulnerability with a CVSS 3.x base score of 6.3. 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 6.3)
CVSS v2: 6.5
CVSS v4: 2.1
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12538
Weakness: CWE-918
Published: 2026-03-17
Last modified: 2026-06-17

Description

A weakness has been identified in frdel/agent0ai agent-zero 0.9.7. This affects the function handle_pdf_document of the file python/helpers/document_query.py. This manipulation causes server-side request forgery. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2026-4308?: A weakness has been identified in frdel/agent0ai agent-zero 0.9.7. This affects the function handle_pdf_document of the file python/helpers/document_query.py. This manipulation causes server-side request forgery. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2026-4308?: CVE-2026-4308 has a CVSS 3.x base score of 6.3, 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 low.
Is CVE-2026-4308 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-4308?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4308 have an EU (EUVD) identifier?: Yes. CVE-2026-4308 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12538.
When was CVE-2026-4308 published?: CVE-2026-4308 was published on 2026-03-17 and last updated on 2026-06-17.

References

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