Secuno
ENNL
Book demo

CVE-2026-32873

Vshakitskiy Ewe denial of service

7.5 HIGHPublic exploitEPSS 0.64%
  1. Published20 Mar 2026

Description

ewe is a Gleam web server. Versions 0.8.0 through 3.0.4 contain a bug in the handle_trailers function where rejected trailer headers (forbidden or undeclared) cause an infinite loop. When handle_trailers encounters such a trailer, three code paths (lines 520, 523, 526) recurse with the original buffer (rest) instead of advancing past the rejected header (Buffer(header_rest, 0)), causing decoder.decode_packet to re-parse the same header on every iteration. The resulting loop has no timeout or escape — the BEAM process permanently wedges at 100% CPU. Any application that calls ewe.read_body on chunked requests is affected, and this is exploitable by any unauthenticated remote client before control returns to application code, making an application-level workaround impossible. This issue is fixed in version 3.0.5.

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

Vshakitskiy Ewe≥ 0.8.0 < 3.0.5

Remediation

Fixed in
Vshakitskiy Ewe≥ 3.0.5

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-201548.6
A vulnerability in the system rate-limiting process for syslog message 419002 of Cisco…
CVE-2026-585928.3
Ladybird before commit 2f9dc7e contains a dangling-reference memory-safety flaw in its…
CVE-2026-531759.8
In the Linux kernel, the following vulnerability has been resolved: inet: frags: fix…
CVE-2026-530069.8
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible…
CVE-2026-529528.8
In the Linux kernel, the following vulnerability has been resolved: iommu: Fix WARN_ON…
CVE-2026-529249.8
In the Linux kernel, the following vulnerability has been resolved: sctp: purge…

Frequently asked

Is CVE-2026-32873 being actively exploited?

CVE-2026-32873 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.64%.

How severe is CVE-2026-32873?

CVE-2026-32873 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.64% probability of exploitation.

Which products are affected by CVE-2026-32873?

Affected products include Vshakitskiy Ewe.

How do I fix CVE-2026-32873?

Upgrade affected software to a fixed version, for example Vshakitskiy Ewe 3.0.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-32873 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.