XSS in Stefanprodan Podinfo
CVE-2026-43644
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Stefanprodan Podinfo — versions 0
Weakness classification (CWE)
References
- github.com/Niccolo10/Security-Advisories/blob/main/CVE-2026-43644/cve-2026-4364… (Exploit, technical-description, Third Party Advisory, exploit, Mitigation)
- github.com/stefanprodan/podinfo/issues/474 (issue-tracking, Issue Tracking)
- www.vulncheck.com/advisories/podinfo-reflected-xss-via-echo-endpoint (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-43644?
- CVE-2026-43644 is a medium-severity vulnerability in Stefanprodan Podinfo, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-05-14.
- How severe is CVE-2026-43644?
- Medium severity. CVSS v3 base score is 5.4 out of 10.