GHSA-xw57-23p8-9wc5
@asymmetric-effort/specifyjs: Localhost bypass incomplete (IPv6, 0.0.0.0, 127.x range)
GHSA-xw57-23p8-9wc5 is a medium vulnerability (CVSS 6.9) in @asymmetric-effort/specifyjs, published July 2, 2026. No source lists public exploit code. Fixed in @asymmetric-effort/specifyjs 0.2.136.
- Severity
- 6.9 MediumCVSS 4.0, GitHub Advisories
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
0.2.136@asymmetric-effort/specifyjs
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@asymmetric-effort/specifyjsnpm | before 0.2.136 | 0.2.136 |
What each source reports
GitHub Advisories Score used
@asymmetric-effort/specifyjs: Localhost bypass incomplete (IPv6, 0.0.0.0, 127.x range)
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.
- Record
GHSA-xw57-23p8-9wc5- CVSS 4.0
- 6.9 Medium
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 - Weakness
- CWE-918
- Updated
- 2026-11-02
OSV
@asymmetric-effort/specifyjs: Localhost bypass incomplete (IPv6, 0.0.0.0, 127.x range)
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.
- Record
GHSA-xw57-23p8-9wc5- CVSS 4.0
- 6.9 Medium
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 - Weakness
- CWE-918
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
github.com/asymmetric-effort/specifyjs/security/advisories/GHSA-xw57-23p8-9wc5