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VulnerabilityPublished

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

Affects @asymmetric-effort/specifyjsSource GCVE Database

0

CVSS 6.9 Medium : upgrade to 0.2.136 when convenient.

Data as of 3 Jul 2026, 22:49 UTC

CVSS 4.0 base score
6.9Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 0.2.136
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

What to do

Upgrade @asymmetric-effort/specifyjs to 0.2.136.

Affected software

ProductAffectedFixed in
npm@asymmetric-effort/specifyjsAffected
  • <0.2.136
Fixed in
  • 0.2.136

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade @asymmetric-effort/specifyjs to version 0.2.136 or later, where the localhost detection logic has been corrected to include 'localhost', '127.0.0.1', '[::1]', '0.0.0.0', and the entire 127.x.x.x range. No other mitigation is required as the fix addresses the vulnerability directly.

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.

References

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