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

> Attackers can execute arbitrary scripts in the victim's browser via reflected XSS in podinfo's echo endpoints, potentially leading to session hijacking.

- **Severity:** Medium 5.1 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 14 May 2026
- **Updated:** 8 Oct 2026
- **Also known as:** GHSA-q23m-vm9r-5745, GO-2026-5560

## What is CVE-2026-43644?

CVE-2026-43644 is a medium-severity cross-site scripting vulnerability in stefanprodan podinfo, published on 14 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### 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.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-43644?

3 open source packages ship an affected version, including github.com/stefanprodan/podinfo. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/stefanprodan/podinfo` | Go | All versions | 1.8.1-0.20260519111337-cbebb20fd485 |
| `github.com/stefanprodan/podinfo` | Go | All versions | 1.8.1-0.20260519111337-cbebb20fd485 |
| `github.com/stefanprodan/podinfo` | Go | All versions | 1.8.1-0.20260519111337-cbebb20fd485 |

Products: Stefanprodan Podinfo.

## How do I fix CVE-2026-43644?

Upgrade github.com/stefanprodan/podinfo to 1.8.1-0.20260519111337-cbebb20fd485 or later.

## Is CVE-2026-43644 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43644 exists.

## Other vulnerabilities in stefanprodan podinfo

- [CVE-2025-70849](https://insights.sbomify.com/CVE-2025-70849/): Podinfo affected by Arbitrary File Upload that leads to Stored Cross-Site Scripting (XSS) (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-43644 and fix it if it is affected.

What it is: CVE-2026-43644 is a medium-severity cross-site scripting vulnerability in stefanprodan podinfo, published on 14 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43644 exists.

Affected packages and fixed versions:
- github.com/stefanprodan/podinfo (Go): affected all versions; fixed in 1.8.1-0.20260519111337-cbebb20fd485
- github.com/stefanprodan/podinfo (Go): affected all versions; fixed in 1.8.1-0.20260519111337-cbebb20fd485
- github.com/stefanprodan/podinfo (Go): affected all versions; fixed in 1.8.1-0.20260519111337-cbebb20fd485

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-43644/ (Markdown: https://insights.sbomify.com/CVE-2026-43644/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-43644
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-43644
- OSV: https://osv.dev/vulnerability/CVE-2026-43644

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-43644/
Summaries are generated and may contain mistakes; the official description above is the record.