CVE-2026-91154 Missing authentication in Ecommerce Template product cache revalidation allows unauthenticated denial of service
Unauthenticated attackers can force product cache expiration, causing denial of service by overwhelming the database with uncached requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91154?
CVE-2026-91154 is a medium-severity missing authorization vulnerability in MarcosCamara01 Ecommerce Template, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Missing Authentication for Critical Function (CWE-306) in the product cache revalidation Server Action (src/app/actions.ts, revalidateProducts) in MarcosCamara01 Ecommerce Template before commit ec97209 allows a remote, unauthenticated attacker to force expiration of the entire storefront product cache at will. The file declares "use server" at file scope, so every exported function compiles into a POST-invokable Server Action; revalidateProducts calls updateTag("products") with no session or role check, unlike the read-only actions in the same file which are safe by construction. Two client components under src/components/admin import the function, which causes its Server Action id to be compiled into a public /_next/static chunk that the application's admin middleware (proxy.ts) does not gate, so any unauthenticated user can extract that id from the public bundle and invoke the action directly. With cacheComponents enabled, the entire storefront (home, categories, product pages, search) is served from "use cache" entries produced by getAllProducts, getCategoryProducts and getProduct, all tagged products with an hours-long cacheLife. Repeated unauthenticated invocation of revalidateProducts keeps that cache permanently cold, forcing every visitor's request to read the full product catalog from Postgres instead of serving from cache, degrading storefront availability at near-zero attacker cost.
Weakness: CWE-306
Which versions are affected by CVE-2026-91154?
How do I fix CVE-2026-91154?
No fix has been published for CVE-2026-91154 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-91154 being exploited?
There is no known exploitation of CVE-2026-91154 in the wild and no public exploit code.
Sources
Also known as GHSA-v9ch-cf39-43vr.