CVE-2026-59299 Composition lookup can potentially poison base function in Spring Cloud Function
Attackers can poison base functions via composition lookup in Spring Cloud Function, potentially leading to arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-59299?
CVE-2026-59299 is a low-severity code injection vulnerability in Spring Cloud Function, published on 27 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Composition lookup can potentially poison base function in Spring Cloud Function. Spring Cloud Function 5.0.0 - 5.0.3 Spring Cloud Function 4.3.0 - 4.3.4 Spring Cloud Function 4.2.0 - 4.2.7 Spring Cloud Function 3.2.16 and earlier
Weakness: CWE-471
Which versions are affected by CVE-2026-59299?
It affects 1 product.
Products include Vmware Spring Cloud Function.
How do I fix CVE-2026-59299?
Upgrade to a fixed version.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-59299 being exploited?
There is no known exploitation of CVE-2026-59299 in the wild and no public exploit code.
Other vulnerabilities in Spring Cloud Function
- CVE-2022-22979 Denial of Service in Spring Cloud Function
- CVE-2026-40989 Self Routing guard bypassed via function composition
- CVE-2026-40990 Unbounded cache for function definitions
- CVE-2026-59297 Spring Cloud Function can incorrectly determine if URI is secure
- CVE-2026-59298 Potential for improper filtering of HTTP headers in Spring Cloud Function
Sources
Also known as GHSA-r954-5cwm-rfh6.