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VulnerabilityPublished

CVE-2026-27961: agenta · Template Injection

Affects agentaSource CVE Database V5

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Not known to be exploited · CVSS 8.8 High : upgrade to 0.86.8 soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.86.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade agenta and agenta-ai/agenta to 0.86.8.

Affected software

ProductAffectedFixed in
Agenta-AIagentaAffected
  • <0.86.8
Fixed in
  • 0.86.8
GitHubagenta-ai/agentapkg:github/agenta-ai/agentaOther threatsAffected
  • <0.86.8
Fixed in
  • 0.86.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Organizations should immediately upgrade all Agenta deployments to version 0.86.8 or later, where the vulnerability is patched. For environments where immediate upgrade is not feasible, implement strict access controls to limit API server evaluator usage to trusted users only, minimizing the risk of exploitation. Employ network segmentation to isolate Agenta servers from broader internal networks to contain potential breaches. Monitor logs for unusual template rendering requests or errors indicative of injection attempts. Conduct code reviews and security testing focused on template usage in custom evaluators. Disable or restrict evaluator functionality if not essential. Additionally, implement runtime application self-protection (RASP) or web application firewalls (WAFs) with rules targeting SSTI patterns to provide an additional layer of defense. Finally, maintain an incident response plan tailored to potential code injection attacks to enable rapid containment and remediation.

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.

References

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