What is GHSA-xw57-23p8-9wc5?

GHSA-xw57-23p8-9wc5 is a security advisory published by GitHub Security Advisories with Medium severity. @asymmetric-effort/specifyjs: Localhost bypass incomplete (IPv6, 0.0.0.0, 127.x range)

Why does GHSA-xw57-23p8-9wc5 have no CVE ID yet?

GitHub Security Advisories published this advisory directly to customers before NVD assigned a CVE ID. This is the embargo-window disclosure pattern — vendors notify customers on day 0; NVD's public record follows days to weeks later.

Which products are affected by GHSA-xw57-23p8-9wc5?

GHSA-xw57-23p8-9wc5 affects 1 product, including: npm/@asymmetric-effort/specifyjs:\u003c 0.2.136.

GHSA-xw57-23p8-9wc5MediumDisclosed before NVD

@asymmetric-effort/specifyjs: Localhost bypass incomplete (IPv6, 0.0.0.0, 127.x range)

Vendor

GitHub Security Advisories

Published

July 2, 2026

Last Modified

July 2, 2026

📋 Description

Finding

Location: core/src/shared/secure-fetch.ts:52-54

The localhost exception allowed localhost and 127.0.0.1 but did not cover 0.0.0.0, [::1] (IPv6 localhost), or the full 127.0.0.0/8 loopback range.

Status

Fixed in v0.2.136 — Localhost detection now covers localhost, 127.0.0.1, [::1], 0.0.0.0, and the full 127.x.x.x range.

🎯 Affected products1

npm/@asymmetric-effort/specifyjs:< 0.2.136

🔗 References (4)

https://github.com/asymmetric-effort/specifyjs/security/advisories/GHSA-xw57-23p8-9wc5
https://github.com/asymmetric-effort/specifyjs/commit/25d1fb491d99479efdf501f5f75e0bb80c908f0a
https://github.com/asymmetric-effort/specifyjs/commit/293124c51bf797c0f5cdae32981110545850a893
https://github.com/advisories/GHSA-xw57-23p8-9wc5