CVE-2026-32881: ewe is a Gleam web server

Q: How do I fix CVE-2026-32881?

ewe: upgrade to 3.0.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-32881 being exploited?

CVE-2026-32881 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-32881 affect?

CVE-2026-32881 affects ewe. Severity is medium (CVSS 5.3). ewe is a Gleam web server. ewe is a Gleam web server. Versions 0.6.0 through 3.0.4 are vulnerable to authentication bypass or spoofed proxy-trust headers. Chunked transfer encoding trailer handling merges declared trailer fields into req.he

Q: How urgent is CVE-2026-32881?

Priority 37/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-32881 is a medium-severity flaw (CVSS 5.3) affecting ewe. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ewe is a Gleam web server. ewe is a Gleam web server. Versions 0.6.0 through 3.0.4 are vulnerable to authentication bypass or spoofed proxy-trust headers. Chunked transfer encoding trailer handling merges declared trailer fields into req.headers after body parsing, but the denylist only blocks 9 header names. A malicious client can exploit this by declaring these headers in the Trailer field and appending them after the final chunk, causing requ

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-183
Published	2026-03-20
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: vshakitskiy

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-20 02:16 UTCPublished CVE record published
2026-06-17 10:36 UTCUpdated Record last modified

vshakitskiy ewe UPGRADE

Affected: < 3.0.5

Fixed in: 3.0.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ewe || rpm -q ewe || ewe --version

2. UPGRADE to 3.0.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ewe

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ewe

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-32881?

ewe: upgrade to 3.0.5. Exact commands for each OS are on this page.

Is CVE-2026-32881 being exploited?

CVE-2026-32881 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-32881 affect?

CVE-2026-32881 affects ewe. Severity is medium (CVSS 5.3). ewe is a Gleam web server. ewe is a Gleam web server. Versions 0.6.0 through 3.0.4 are vulnerable to authentication bypass or spoofed proxy-trust headers. Chunked transfer encoding trailer handling merges declared trailer fields into req.he

How urgent is CVE-2026-32881?

Priority 37/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-34715 MEDIUM 5.3 UPGRADE ewe is a Gleam web server
CVE-2026-32873 HIGH 7.5 UPGRADE ewe is a Gleam web server

References

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