Vulnerability · Published May 14, 2026 · Assigned by VulnCheck

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

Medium 5.4

In plain English

A medium-severity cross-site scripting in podinfo from stefanprodan. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 90.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/stefanprodan/podinfo	1.8.1-0.20260519111337-cbebb20fd485	GHSA-q23m-vm9r-5745
Go	github.com/stefanprodan/podinfo	1.8.1-0.20260519111337-cbebb20fd485	GO-2026-5560

Affected products (as reported)

Vendor	Product	Versions
stefanprodan	podinfo	0 – through 6.11.2

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References

https://github.com/Niccolo10/Security-Advisories/blob/main/CVE-2026-43644/cve-2026-43644.md technical-description, exploit
https://github.com/stefanprodan/podinfo/issues/474 issue-tracking
https://www.vulncheck.com/advisories/podinfo-reflected-xss-via-echo-endpoint third-party-advisory