How severe is CVE-2026-34172?

CVE-2026-34172 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-34172 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34172?

CVE-2026-34172 primarily affects Giskard Giskard-agent. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-34172?

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-2026-34172 have an EU (EUVD) identifier?

Yes. CVE-2026-34172 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17451.

When was CVE-2026-34172 published?

CVE-2026-34172 was published on 2026-03-31 and last updated on 2026-06-17.

CVE-2026-34172

CVE-2026-34172 is a high-severity vulnerability in Giskard Giskard-agent with a CVSS 3.x base score of 8.8. 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-1336.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 7.7
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17451
Weakness: CWE-1336
Affected product: Giskard Giskard-agent
Published: 2026-03-31
Last modified: 2026-06-17

Description

Giskard is an open-source Python library for testing and evaluating agentic systems. Prior to versions 0.3.4 and 1.0.2b1, ChatWorkflow.chat(message) passes its string argument directly as a Jinja2 template source to a non-sandboxed Environment. A developer who passes user input to this method enables full remote code execution via Jinja2 class traversal. The method name chat and parameter name message naturally invite passing user input directly, but the string is silently parsed as a Jinja2 template, not treated as plain text. This issue has been patched in versions 0.3.4 and 1.0.2b1.

Frequently asked questions

What is CVE-2026-34172?: Giskard is an open-source Python library for testing and evaluating agentic systems. Prior to versions 0.3.4 and 1.0.2b1, ChatWorkflow.chat(message) passes its string argument directly as a Jinja2 template source to a non-sandboxed Environment. A developer who passes user input to this method enables full remote code execution via Jinja2 class traversal. The method name chat and parameter name message naturally invite passing user input directly, but the string is silently parsed as a Jinja2 template, not treated as plain text. This issue has been patched in versions 0.3.4 and 1.0.2b1.
How severe is CVE-2026-34172?: CVE-2026-34172 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-34172 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34172?: CVE-2026-34172 primarily affects Giskard Giskard-agent. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-34172?: 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-2026-34172 have an EU (EUVD) identifier?: Yes. CVE-2026-34172 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17451.
When was CVE-2026-34172 published?: CVE-2026-34172 was published on 2026-03-31 and last updated on 2026-06-17.

References

https://github.com/Giskard-AI/giskard-oss/security/advisories/GHSA-frv4-x25r-588m

Affected products (3)

cpe:2.3:a:giskard:giskard-agent:*:*:*:*:*:python:*:*
cpe:2.3:a:giskard:giskard-agent:1.0.2:alpha1:*:*:*:python:*:*
cpe:2.3:a:giskard:giskard-agents:1.0.1:alpha1:*:*:*:python:*:*

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