CVE-2026-9656 Information disclosure in HubSpot All-In-One Marketing – Forms, Popups, Live Chat
Authenticated contributors can extract plaintext HubSpot OAuth refresh tokens from localized scripts, enabling unauthorized access to tenant data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-9656?
CVE-2026-9656 is a medium-severity vulnerability in hubspotdev HubSpot All-In-One Marketing – Forms, Popups, Live Chat, published on 17 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The HubSpot All-In-One Marketing – Forms, Popups, Live Chat plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 11.3.62 via the wp_localize_script() / window.leadinConfig JavaScript object. This makes it possible for authenticated attackers, with contributor-level access and above, to extract the site's plaintext HubSpot OAuth refresh token exposed via the window.leadinConfig JavaScript object, which can then be used to access or modify data in the connected HubSpot tenant. Although the refresh token is stored at rest with AES-256-CTR encryption, decryption occurs server-side before the plaintext value is passed to wp_localize_script(), rendering the at-rest encryption ineffective against this exposure path.
Weakness: CWE-200
Which versions are affected by CVE-2026-9656?
How do I fix CVE-2026-9656?
No fix has been published for CVE-2026-9656 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-9656 being exploited?
There is no known exploitation of CVE-2026-9656 in the wild and no public exploit code.
Sources
Also known as GHSA-3rq5-wph4-p3mg.