CVE-2023-47390Network attack vector

Bearer token disclosure via unredacted gRPC metadata

Published Nov 11, 2023 · Updated Sep 3, 2024

Information disclosure in Headscale 0.22.3 and earlier allows attackers to obtain bearer tokens from info-level HTTP API logs. The gRPC logging interceptors record inbound request metadata, including authorization and grpcgateway-authorization values, without redaction. Exploitation requires access to the logs; a recovered token grants the API access assigned to that credential.

CVSS severity7.5
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Headscale 0.22.3 and earlier allows attackers to obtain bearer tokens from info-level HTTP API logs. The gRPC logging interceptors record inbound request metadata, including authorization and grpcgateway-authorization values, without redaction. Exploitation requires access to the logs; a recovered token grants the API access assigned to that credential.

The record

CVE
CVE-2023-47390
Published
Nov 11, 2023
Updated
Sep 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-532, T1552.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-532Insertion of Sensitive Information into Log File
T1552.001Credentials In Files

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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