CVE-2022-41925

Environment-variable disclosure via peer API DNS rebinding

Published Nov 23, 2022 · Updated Apr 22, 2025

Origin validation error in the Tailscale peer API before 1.32.3 allows remote attackers to read node environment variables. The peer API accepts browser requests after an attacker-controlled website rebinds its hostname to the node, without validating the request origin. A user must visit the malicious site; exposed data can include credentials or authentication keys that permit tailnet access.

CVSS severity3.8
Low
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in the Tailscale peer API before 1.32.3 allows remote attackers to read node environment variables. The peer API accepts browser requests after an attacker-controlled website rebinds its hostname to the node, without validating the request origin. A user must visit the malicious site; exposed data can include credentials or authentication keys that permit tailnet access.

The record

CVE
CVE-2022-41925
Published
Nov 23, 2022
Updated
Apr 22, 2025
Vendor
Tailscale
Product
Tailscale
Classifications
CWE-346, T1189
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.32.3

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Tailscale · Tailscaleversion=< 1.32.3

Published CVSS scores

3.8Tailscale GitHub Security AdvisoryCVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-346Origin Validation Error
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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