---
title: "CVE-2026-115693: Benoitc hackney - Improper Certificate Validation"
description: "Benoitc hackney 1.24.0 before 4.9.0 contains an improper certificate validation caused by incorrect handling of trust anchors in hackney_ssl, letting on-path attackers impersonate servers pinned to private CAs using publicly trusted roots, exploit requires attacker to have a publicly trusted certificate for the pinned hostname."
url: https://panop.io/threat-heartbeat/CVE-2026-115693/
---

# CVE-2026-115693 Benoitc hackney - Improper Certificate Validation

Benoitc hackney 1.24.0 before 4.9.0 contains an improper certificate validation caused by incorrect handling of trust anchors in hackney\_ssl, letting on-path attackers impersonate servers pinned to private CAs using publicly trusted roots, exploit requires attacker to have a publicly trusted certificate for the pinned hostname.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-115693)

## Details

Type

Improper Certificate Validation

Impact

Man In The Middle

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

26 October 2026

Updated

27 October 2026

Weakness

[CWE-295](https://cwe.mitre.org/data/definitions/295.html)

## Vendor fix

Update to version 4.9.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-115693](https://nvd.nist.gov/vuln/detail/CVE-2026-115693)
- [https://cna.erlef.org/cves/CVE-2026-115693.html](https://cna.erlef.org/cves/CVE-2026-115693.html)
- [https://github.com/benoitc/hackney/commit/915eb5737e9c489d8fc22eec8cdae30e9b027be4](https://github.com/benoitc/hackney/commit/915eb5737e9c489d8fc22eec8cdae30e9b027be4)
- [https://github.com/benoitc/hackney/commit/d8a9afcf5c3849904274e2eba1df56c63d1a1a0c](https://github.com/benoitc/hackney/commit/d8a9afcf5c3849904274e2eba1df56c63d1a1a0c)
- [https://github.com/benoitc/hackney/pull/978](https://github.com/benoitc/hackney/pull/978)
- [https://github.com/benoitc/hackney/releases/tag/4.9.0](https://github.com/benoitc/hackney/releases/tag/4.9.0)
- [https://osv.dev/vulnerability/EEF-CVE-2026-115693](https://osv.dev/vulnerability/EEF-CVE-2026-115693)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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