CVE-2026-1115 Stored XSS in parisneo/lollms

Critical 9.6 Published 10 Apr 2026 Updated 10 Apr 2026

Attackers can inject malicious JavaScript into social posts, leading to account takeover and session hijacking for users viewing the feed.

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: Available

What is CVE-2026-1115?

CVE-2026-1115 is a critical cross-site scripting vulnerability in parisneo/lollms, published on 10 Apr 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

A Stored Cross-Site Scripting (XSS) vulnerability was identified in the social feature of parisneo/lollms, affecting the latest version prior to 2.2.0. The vulnerability exists in the `create_post` function within `backend/routers/social/__init__.py`, where user-provided content is directly assigned to the `DBPost` model without sanitization. This allows attackers to inject and store malicious JavaScript, which is executed in the browsers of users viewing the Home Feed, including administrators. This can lead to account takeover, session hijacking, and wormable attacks. The issue is resolved in version 2.2.0.

Weakness: CWE-79

Which versions are affected by CVE-2026-1115?

3 open source packages ship an affected version, including lollms. It affects 1 product.

Package	Affected	Fixed in
`lollms` PyPI	All versions	`2.2.0`
`lollms` PyPI	All versions	`2.2.0`
`lollms` PyPI	All versions	`2.2.0`

Products include Lollms Lollms.

How do I fix CVE-2026-1115?

Upgrade lollms to 2.2.0 or later.

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-2026-1115 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1115 exists.

Public exploit code: 1 Nuclei template.

Sources

Also known as GHSA-8wrq-fv5f-pfp2, PYSEC-2026-401.