CVE-2026-21269 ColdFusion | Cross-site Scripting (Stored XSS) (CWE-79)
A low-privileged attacker can inject malicious scripts into ColdFusion form fields, leading to code execution in victims' browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-21269?
CVE-2026-21269 is a medium-severity cross-site scripting vulnerability in Adobe Coldfusion, published on 11 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
ColdFusion is affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low-privileged attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim's browser when they browse to the page containing the vulnerable field. Scope is changed.
Weakness: CWE-79
Which versions are affected by CVE-2026-21269?
It affects 1 product.
Products include Adobe Coldfusion.
How do I fix CVE-2026-21269?
No fix has been published for CVE-2026-21269 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-21269 being exploited?
There is no known exploitation of CVE-2026-21269 in the wild and no public exploit code.
Other vulnerabilities in Adobe Coldfusion
- CVE-2026-48282 Adobe ColdFusion Path Traversal
- CVE-2023-38203 Adobe ColdFusion Deserialization of Untrusted Data
- CVE-2023-29300 Adobe ColdFusion Deserialization of Untrusted Data
- CVE-2023-26359 Adobe ColdFusion Deserialization of Untrusted Data
- CVE-2018-15961 Adobe ColdFusion Unrestricted File Upload
Sources
Also known as GHSA-jcvr-p9r8-hcm4.