CVE-2023-38493Public exploitNetwork attack vector

Authorization bypass via unnormalized matrix-variable paths

Published Jul 25, 2023 · Updated Oct 3, 2024

Incorrect authorization in LINE Corporation Armeria 1.24.2 and earlier allows remote attackers to bypass request authorizers. Server-side routing retains semicolon matrix variables when matching decorators but passes the same path to Spring controllers through TomcatService or JettyService, so the controller route and protected prefix are interpreted differently. The flaw is reachable only in Spring-integrated services that protect paths with Armeria decorators; a crafted matrix-variable path grants unauthenticated access to the protected controller response.

CVSS severity7.5
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in LINE Corporation Armeria 1.24.2 and earlier allows remote attackers to bypass request authorizers. Server-side routing retains semicolon matrix variables when matching decorators but passes the same path to Spring controllers through TomcatService or JettyService, so the controller route and protected prefix are interpreted differently. The flaw is reachable only in Spring-integrated services that protect paths with Armeria decorators; a crafted matrix-variable path grants unauthenticated access to the protected controller response.

The record

CVE
CVE-2023-38493
Published
Jul 25, 2023
Updated
Oct 3, 2024
Vendor
LINE Corporation
Product
Armeria
Classifications
CWE-863, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 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?

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

  1. Affected versionversion=0 <1.24.3
  2. Affected versionversion=< 1.24.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LINE Corporation · Armeriaversion=0 <1.24.3; version=< 1.24.3

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.5GitHubCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1190Exploit Public-Facing Application

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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