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Fencer Intel
high 8.8

CVE-2026-94445 json

Malicious user input may lead to RCE in golang.org/x/playground

published last mo. modified last mo. also EUVD-2026-87201

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

A malicious txtar could escape the intended execution context and force arbitrary writes to the playground host's trusted filesystem.

Disjointly, one of the three possible paths to invoke go vet on the playground host did not correctly restrict the execution environment. This permitted a Go process to make a read for an environment configuration file rooted in the playground host's $HOME.

Together, a well-crafted go env file and the go vet invocation could lead to remote code execution in the playground host itself.

This does not affect users of go.dev/play directly; however, it may affect independent deployments of golang.org/x/playground.

Patch / fix

  • golang.org/x/playground golang.org/x/playground 0.0.0-20260924211604-6d73cff14c17

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last mo.

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • golang.org/x/playground golang.org/x/playground

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.