CVE-2025-46721: nosurf is cross-site request forgery (CSRF) protection middleware for Go

Q: How do I fix CVE-2025-46721?

nosurf: upgrade to 1.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-46721 being exploited?

CVE-2025-46721 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-2025-46721 affect?

CVE-2025-46721 affects nosurf. Severity is medium (CVSS 6.1). nosurf is cross-site request forgery (CSRF) protection middleware for Go. A vulnerability in versions prior to 1.2.0 allows an attacker who controls content on the target site, or on a subdomain of the target site (either via XSS, or otherw

Q: How urgent is CVE-2025-46721?

Priority 30/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2025-46721 is a medium-severity flaw (CVSS 6.1) affecting nosurf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

nosurf is cross-site request forgery (CSRF) protection middleware for Go. A vulnerability in versions prior to 1.2.0 allows an attacker who controls content on the target site, or on a subdomain of the target site (either via XSS, or otherwise) to bypass CSRF checks and issue requests on user's behalf. Due to misuse of the Go `net/http` library, nosurf categorizes all incoming requests as plain-text HTTP requests, in which case the `Referer` head

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-352
Published	2025-05-13
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: nosurf project

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

Am I affected?

Timeline

2025-05-13 16:15 UTCPublished CVE record published
2026-06-17 09:26 UTCUpdated Record last modified

nosurf project nosurf UPGRADE

Affected: < 1.2.0

Fixed in: 1.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.2.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nosurf

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-2025-46721?

nosurf: upgrade to 1.2.0. Exact commands for each OS are on this page.

Is CVE-2025-46721 being exploited?

CVE-2025-46721 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-2025-46721 affect?

CVE-2025-46721 affects nosurf. Severity is medium (CVSS 6.1). nosurf is cross-site request forgery (CSRF) protection middleware for Go. A vulnerability in versions prior to 1.2.0 allows an attacker who controls content on the target site, or on a subdomain of the target site (either via XSS, or otherw

How urgent is CVE-2025-46721?

Priority 30/100. Public exploit reference

References

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