CVE-2026-27961
CVE-2026-27961 is a high-severity vulnerability in Agentatech Agenta 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)
- EPSS exploit prediction: 0% (24th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-8817
- Weakness: CWE-1336
- Affected product: Agentatech Agenta
- Published:
- Last modified:
Description
Agenta is an open-source LLMOps platform. A Server-Side Template Injection (SSTI) vulnerability exists in versions prior to 0.86.8 in Agenta's API server evaluator template rendering. Although the vulnerable code lives in the SDK package, it is executed server-side within the API process when running evaluators. This does not affect standalone SDK usage — it only impacts self-hosted or managed Agenta platform deployments. Version 0.86.8 contains a fix for the issue.
Frequently asked questions
- What is CVE-2026-27961?
- Agenta is an open-source LLMOps platform. A Server-Side Template Injection (SSTI) vulnerability exists in versions prior to 0.86.8 in Agenta's API server evaluator template rendering. Although the vulnerable code lives in the SDK package, it is executed server-side within the API process when running evaluators. This does not affect standalone SDK usage — it only impacts self-hosted or managed Agenta platform deployments. Version 0.86.8 contains a fix for the issue.
- How severe is CVE-2026-27961?
- CVE-2026-27961 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-2026-27961 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-27961?
- CVE-2026-27961 affects Agentatech Agenta. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-27961?
- 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-2026-27961 have an EU (EUVD) identifier?
- Yes. CVE-2026-27961 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8817.
- When was CVE-2026-27961 published?
- CVE-2026-27961 was published on 2026-02-26 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:agentatech:agenta:*:*:*:*:*:*:*:*
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