Vulnerability · Published Sep 2, 2026 · Assigned by GitHub_M

CVE-2026-52833Nuclio: Unsanitized runtimeAttributes.repositories injected into Groovy build.gradle leads to build-time RCE

High 8.0

In plain English

A high-severity code injection in nuclio from nuclio. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.0High

Exploit odds (30 days)0.6%top 53.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Nuclio is a "Serverless" framework for Real-Time Events and Data Processing. Prior to version 1.16.5, Nuclio's Java runtime generates a build.gradle file during function builds using Go's text/template package. The template renders runtimeAttributes.repositories[] values with the {{ . }} action, which performs no escaping. An attacker can embed a closing brace (}) to break out of the repositories {} block and append arbitrary Groovy statements that execute unconditionally during the Gradle configuration phase. This issue has been patched in version 1.16.5.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/nuclio/nuclio	1.16.5	GHSA-3v79-m2cg-89ww
Go	github.com/nuclio/nuclio	no fix listed	GO-2026-6004

Affected products (as reported)

Vendor	Product	Versions
nuclio	nuclio	< 1.16.5

Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

References

https://github.com/nuclio/nuclio/security/advisories/GHSA-3v79-m2cg-89ww x_refsource_CONFIRM
https://github.com/nuclio/nuclio/pull/4149 x_refsource_MISC
https://github.com/nuclio/nuclio/commit/4c78040c759068e927f3ed7c6507543c15d4ae56 x_refsource_MISC
https://github.com/nuclio/nuclio/releases/tag/1.16.5 x_refsource_MISC