hackney_url · Interpretation Conflict Vulnerability
Source GCVE Database
Not known to be exploited · CVSS 6.9 Medium : upgrade to 4.9.0 when convenient.
Data as of 26 Oct 2026, 16:53 UTC
- Patch
- Available – fixed in 4.9.0, f19561a0b422376348c91537e51377ab7325f4ee
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 26 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade hackney to 4.9.0; hackney to f19561a0b422376348c91537e51377ab7325f4ee.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| benoitchackney | Affected
| Fixed in
|
| hackneybenoitc/hackney | Affected
| Fixed in
|
Hexhackneypkg:hex/hackneyOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Since the vulnerability affects hackney versions from 4.0.1 before 4.9.0, upgrading to version 4.9.0 or later is implied to resolve the issue. Users should verify with the official vendor advisory or release notes for confirmed fixes and apply updates accordingly.
Description
A Server Side Request Forgery (SSRF) vulnerability exists in the hackney_url component of the benoitc hackney library. It arises from an interpretation conflict when handling percent-encoded bracketed IPv6 literals or IP literals with trailing dots. This causes the library to bypass allowlist checks and connect to unintended IP addresses. The issue affects hackney versions from 4.0.1 up to but not including 4.9.0.
References
- nvd.nist.gov/vuln/detail/CVE-2026-115700 (opens in a new tab)
- github.com/benoitc/hackney/pull/987 (opens in a new tab)
- github.com/benoitc/hackney/commit/452620a92ec1da2e6b4862a049a2a4f04b42068f (opens in a new tab)
- github.com/benoitc/hackney/commit/f19561a0b422376348c91537e51377ab7325f4ee (opens in a new tab)
- cna.erlef.org/cves/CVE-2026-115700.html (opens in a new tab)
- github.com/benoitc/hackney/releases/tag/4.9.0 (opens in a new tab)
- osv.dev/vulnerability/EEF-CVE-2026-115700 (opens in a new tab)