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CVE-2026-78661VulnerabilityPublished

Microsoft · Avoid quadratic complexity when coalescing text nodes in html in golang.org/x/net

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-78661· Medium

Not known to be exploited.

Data as of 31 Oct 2026, 08:23 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
EPSS
0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Gogolang.org/x/netpkg:golang/golang.org/x/netOther threatsAffected
  • =3.0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, users should be aware of potential performance impacts when processing HTML with the affected version.

Description

A vulnerability identified as CVE-2026-78661 involves quadratic complexity when coalescing text nodes in the golang.org/x/net package. The issue is specifically noted in version 3.0 of the affected software. No CVSS score or detailed impact information is provided.

References

Community reviews

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