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Fencer Intel
low 3.8

CVE-2022-41925 json

Tailscale daemon is vulnerable to information disclosure via CSRF

published 3y ago modified 4mo ago also GHSA-qccm-wmcq-pwr6 , GO-2022-1119 , EUVD-2022-7411

cvss
3.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

A vulnerability identified in the Tailscale client allows a malicious website to access the peer API, which can then be used to access Tailscale environment variables. In the Tailscale client, the peer API was vulnerable to DNS rebinding. This allowed an attacker-controlled website visited by the node to rebind DNS for the peer API to an attacker-controlled DNS server, and then making peer API requests in the client, including accessing the node’s Tailscale environment variables. An attacker with access to the peer API on a node could use that access to read the node’s environment variables, including any credentials or secrets stored in environment variables. This may include Tailscale authentication keys, which could then be used to add new nodes to the user’s tailnet. The peer API access could also be used to learn of other nodes in the tailnet or send files via Taildrop. All Tailscale clients prior to version v1.32.3 are affected. Upgrade to v1.32.3 or later to remediate the issue.

Patch / fix

  • go tailscale.com/cmd 1.32.3
  • go tailscale.com 1.32.3
  • tailscale tailscale 1.32.3
  • tailscale Alpine 3.24 1.32.3-r0

alpine advisories ALPINE-CVE-2022-41925

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • emily.id.au https://emily.id.au/tailscale referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 3.8 CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
NVD 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
GitHub 3.0 3.8 CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
go tailscale.com/cmd
<1.32.3
1.32.3
go tailscale.com
<1.32.3
1.32.3

Affected products

  • tailscale tailscale

Classification

Weakness
  • CWE-352 Cross-Site Request Forgery
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

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.