Secuno
ENNL
Book demo

CVE-2026-47067

Benoitc Hackney denial of service

7.5 HIGHPublic exploitEPSS 0.70%
  1. Published25 May 2026

Description

Allocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding. The URL parser in src/hackney_url.erl converts every unrecognized URL scheme to a permanent BEAM atom via binary_to_atom/2. BEAM atoms are never garbage-collected and the atom table defaults to a hard limit of 1,048,576 entries. An attacker who can supply URLs with attacker-chosen scheme prefixes — directly as request targets, as configured webhook URLs, or via Location headers followed during redirects — can exhaust the atom table and crash the entire BEAM VM with system_limit. This issue affects hackney: from 2.0.0 before 4.0.1.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Benoitc Hackney≥ 2.0.0 < 4.0.1

Remediation

Fixed in
Benoitc Hackney≥ 4.0.1

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-1031028.6
Pexip Infinity before 41.0 is affected by improper input validation in the signaling…
CVE-2026-1031018.6
Pexip Infinity 30.0 through 40.x before 41.0 is affected by improper input validation…
CVE-2026-824399.8
Description The DRPC server kept a map from function name to request queue and created…
CVE-2026-478919.8
A Spring WebFlux application that relies on the Aalto XML processor to parse XML input…
CVE-2026-735418.2
Allocation of Resources Without Limits or Throttling in ZenHive mpp allows an…
CVE-2026-748789.8
openssl_encrypt versions before 1.4.0 use an in-memory rate limiter for TOTP…

Frequently asked

Is CVE-2026-47067 being actively exploited?

CVE-2026-47067 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.70%.

How severe is CVE-2026-47067?

CVE-2026-47067 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.70% probability of exploitation.

Which products are affected by CVE-2026-47067?

Affected products include Benoitc Hackney.

How do I fix CVE-2026-47067?

Upgrade affected software to a fixed version, for example Benoitc Hackney 4.0.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-47067 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.