CVE-2026-22820Public exploitNetwork attack vector

Subscription-limit bypass via unlocked tunnel registration

Published Jan 14, 2026 · Updated Jan 14, 2026

TOCTOU race condition in OutRay before 0.1.5 allows remote attackers to exceed subscription limits through concurrent tunnel registrations. The tunnel registration endpoint reads the active count from Redis and then inserts a database row without a transaction or row lock, so parallel requests act on the same stale count. Exploitation requires concurrent registrations and consumes server resources without the subscription charges intended for the additional tunnels.

CVSS severity6.3
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

TOCTOU race condition in OutRay before 0.1.5 allows remote attackers to exceed subscription limits through concurrent tunnel registrations. The tunnel registration endpoint reads the active count from Redis and then inserts a database row without a transaction or row lock, so parallel requests act on the same stale count. Exploitation requires concurrent registrations and consumes server resources without the subscription charges intended for the additional tunnels.

The record

CVE
CVE-2026-22820
Published
Jan 14, 2026
Updated
Jan 14, 2026
Vendor
OutRay
Product
OutRay
Classifications
CWE-367
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 2026Record 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=< 0.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OutRay · OutRayversion=< 0.1.5

Published CVSS scores

6.3GitHub, Inc.CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.7NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition

Public exploit references

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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