CVE-2026-25680: Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.

Q: How do I fix CVE-2026-25680?

net: upgrade to 0.55.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-25680 being exploited?

CVE-2026-25680 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-2026-25680 affect?

CVE-2026-25680 affects net. Severity is medium (CVSS 6.5). Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.

Q: How urgent is CVE-2026-25680?

Priority 29/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2026-25680 is a medium-severity flaw (CVSS 6.5) affecting net. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-400
Published	2026-05-22
Last modified	2026-07-23

Publisher (CNA): Go Project · Vendor: golang

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-22 16:16 UTCPublished CVE record published
2026-07-23 16:10 UTCUpdated Record last modified

golang net UPGRADE

Affected: < 0.55.0

Fixed in: 0.55.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.55.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade net

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-2026-25680?

net: upgrade to 0.55.0. Exact commands for each OS are on this page.

Is CVE-2026-25680 being exploited?

CVE-2026-25680 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-2026-25680 affect?

CVE-2026-25680 affects net. Severity is medium (CVSS 6.5). Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.

How urgent is CVE-2026-25680?

Priority 29/100. No elevated risk signals yet.

Software pages

Go (Golang) vulnerabilities

Related CVEs

CVE-2026-39821 CRITICAL 9.6 UPGRADE The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only la
CVE-2026-25681 MEDIUM 6.1 UPGRADE Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree
CVE-2026-27136 MEDIUM 6.1 UPGRADE Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree
CVE-2026-42502 MEDIUM 6.1 UPGRADE Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree
CVE-2026-42506 MEDIUM 6.1 UPGRADE Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree

References

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