CVE-2026-25680 | Invoking denial of service when parsing arbitrary HTML in golang.org/x/net/html

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

Published: 2026-05-22 Last update: 2026-05-29 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-25680 is rated Low Risk (32.8/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.06%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-25680

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-28 0.04% 0.06% +0.02%
2 2026-05-23 — 0.04% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-25680

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2026-25680

GitHub Security Advisory for CVE-2026-25680

GHSA-5cv4-jp36-h3mw · Severity: medium — Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.

OS Trackers for CVE-2026-25680

vendor priority summary link
debian not yet assigned CVE-2026-25680 not yet assigned priority: Debian including 1 source packages (golang-golang-x-net), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 4, resolved 1. https://security-tracker.debian.org/tracker/CVE-2026-25680
suse medium CVE-2026-25680 severity moderate: SUSE including 3 source package names (rclone-1.74.2-1.1, rclone-bash-completion-1.74.2-1.1, rclone-zsh-completion-1.74.2-1.1), 3 product×package rows across 1 product lines (openSUSE Tumbleweed): Fixed 3. https://www.suse.com/security/cve/CVE-2026-25680/
ubuntu medium CVE-2026-25680 medium priority: Ubuntu including 1 source packages (golang-golang-x-net-dev), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, resolute, upstream, xenial): DNE 4, needs-triage 4. https://ubuntu.com/security/CVE-2026-25680

Affected software / configurations for CVE-2026-25680

Vendor Product Version Raw CPE
golang net < 0.55.0 cpe:2.3:a:golang:net:*:*:*:*:*:go:*:*

References for CVE-2026-25680

cvelogic Threat Intelligence