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.
CVE-2022-41925
This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 67% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(medium)
- EPSS
- 41.3%
- KEV
- Not listed
Published
November 23, 2022
Last Modified
November 21, 2024
References (6)
- security-advisories@githubhttps://emily.id.au/tailscale
- security-advisories@githubhttps://github.com/tailscale/tailscale/security/advisories/GHSA-qccm-wmcq-pwr6
- security-advisories@githubhttps://tailscale.com/security-bulletins/#ts-2022-005
- af854a3a-2127-422b-91ae-364da2661108https://emily.id.au/tailscale
- af854a3a-2127-422b-91ae-364da2661108https://github.com/tailscale/tailscale/security/advisories/GHSA-qccm-wmcq-pwr6
- af854a3a-2127-422b-91ae-364da2661108https://tailscale.com/security-bulletins/#ts-2022-005
Affected Packages
(2 across 1 ecosystem)
Go(2)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| tailscale.com | — | 1.32.3 | — |
| tailscale.com/cmd | — | 1.32.3 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 44× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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- 2026-05-25 11:36 UTCEG score recompute
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Frequently asked(5)
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