# Nuclei: Environment Variable Disclosure via Response-Derived Data in DAST/Fuzz Mode

Advisory record · `GHSA-jpvm-9frm-hjcq`

- **Identifiers:** `GHSA-jpvm-9frm-hjcq` · `CVE-2026-76805` · `GO-2026-6571`
- **State:** Confirmed
- **Severity:** CVSS 5.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-200](https://cwe.mitre.org/data/definitions/200.html)
- **Tags:** [Information disclosure](https://agentprime.io/advisories/tag/info-disclosure.md)
- **Published:** 22 Sept 2026
- **Updated:** 1 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 22 Sept 2026, 20:37 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `github.com/projectdiscovery/nuclei/v3` (Go): affected `>=3.0.0, <3.10.0`; fixed in `3.10.0`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Nuclei (github.com/projectdiscovery/nuclei/v3) versions 3.0.0 up to 3.10.0 are affected. A malicious target server can return response data that, when reused in a later DAST/fuzz step with the -env-vars (-ev) option enabled, causes scanner-host environment variables such as API keys or tokens to be disclosed. Upgrade to version 3.10.0 or later, or disable -ev when scanning untrusted targets.

Written 1 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 5.3 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0041, the 35th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:12 UTC: First seen by agentprime
- 31 Oct 2026, 14:12 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-jpvm-9frm-hjcq)

## Sources

- [GitHub Advisory Database: GHSA-jpvm-9frm-hjcq](https://github.com/advisories/GHSA-jpvm-9frm-hjcq)
- [OSV: GHSA-jpvm-9frm-hjcq](https://osv.dev/vulnerability/GHSA-jpvm-9frm-hjcq)
- <https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jpvm-9frm-hjcq>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-76805>
- <https://github.com/projectdiscovery/nuclei/pull/7499>
- <https://github.com/projectdiscovery/nuclei/commit/ccbfb12bd01447ba25f6e755dfb2bee677736da6>
- <https://github.com/projectdiscovery/nuclei>
- <https://github.com/projectdiscovery/nuclei/releases/tag/v3.10.0>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-jpvm-9frm-hjcq>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-jpvm-9frm-hjcq/>. Everything for agents: <https://agentprime.io/llms.txt>.