CVE-2026-34691 Adobe Experience Manager Forms JEE | Cross-site Scripting (Stored XSS) (CWE-79)

Critical 9.3 Published 9 Jun 2026 Updated 27 Aug 2026

Attackers can inject malicious scripts into form fields, leading to session hijacking or account takeover when victims view the page.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-34691?

CVE-2026-34691 is a critical cross-site scripting vulnerability in Adobe Experience Manager, published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Adobe Experience Manager Forms JEE versions LTS SP1, 6.5.24.0 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by an 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, potentially gaining elevated access or control over the victim's account or session. Scope is changed.

Weakness: CWE-79

Which versions are affected by CVE-2026-34691?

It affects 1 product.

Products include Adobe Experience Manager.

How do I fix CVE-2026-34691?

No fix has been published for CVE-2026-34691 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-2026-34691 being exploited?

There is no known exploitation of CVE-2026-34691 in the wild and no public exploit code.

All Adobe Experience Manager vulnerabilities

Sources

Also known as GHSA-hpmf-43r3-vfhj.