---
id: "CVE-2026-116201"
kind: "vulnerability"
aliases: ["CVE-2026-116201"]
title: "Snipe-IT: concurrent SAML assertion replay yields multiple victim sessions"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "php", "saml", "self-hosted", "snipe-it"]
not_affected_if: ["default-config", "local-auth-only"]
published_at: "2026-10-25T14:17:00+00:00"
first_seen_at: "2026-10-25T14:41:23+00:00"
updated_at: "2026-10-25T14:42:12+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116201", "first_seen_at": "2026-10-25T14:41:23+00:00"}]
---

# Snipe-IT: concurrent SAML assertion replay yields multiple victim sessions

Snipe-IT before 8.5.0 has a race in its SAML assertion handler: the nonce check is not atomic, so a captured assertion can be replayed with concurrent POSTs to /saml/acs. An attacker can obtain several authenticated victim sessions that survive IdP-driven revocation.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Snipe-IT version, for example with `php artisan --version` or the version shown in the admin footer; anything below `8.5.0` is affected.
- Confirm SAML single sign-on is enabled in the Snipe-IT SAML settings; without SAML the flaw does not apply.

## Fix

- Upgrade Snipe-IT to `8.5.0` or later.
- Until upgraded, consider disabling SAML login or rotating active sessions after revoking users at the identity provider.

## Timeline

- 2026-10-25T14:41:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116201

## From the sources

Snipe-IT before 8.5.0 contains a SAML assertion replay vulnerability that allows attackers to reuse captured assertions by exploiting a non-atomic nonce check in the SAML acs handler. Attackers can send concurrent POST requests to /saml/acs with one captured assertion to obtain multiple authenticated victim sessions that evade IdP-driven revocation.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_