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.

CVSS 4.0

5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS 3.1

6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 9% of CVEs (scores of 2026-10-25)

CWE

CWE-79

Published

2026-05-14

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• stefanprodan:podinfo

Packages (OSV)

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

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