CVE-2024-42367Network attack vector

Unauthenticated local-file disclosure via compressed symlink following

Published Aug 9, 2024 · Updated Jun 9, 2025

Path traversal in aio-libs aiohttp 3.10.0b1 through 3.10.1 allows remote attackers to read local files through static routes. FileResponse checks neither containment nor link type for .gz or .br variants, then follows symlinks with Path.stat() and Path.open(). Exposure requires an aiohttp server with a static route and a compressed-variant symlink outside its root, or a way for attackers to create one.

CVSS severity4.8
Medium
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in aio-libs aiohttp 3.10.0b1 through 3.10.1 allows remote attackers to read local files through static routes. FileResponse checks neither containment nor link type for .gz or .br variants, then follows symlinks with Path.stat() and Path.open(). Exposure requires an aiohttp server with a static route and a compressed-variant symlink outside its root, or a way for attackers to create one.

The record

CVE
CVE-2024-42367
Published
Aug 9, 2024
Updated
Jun 9, 2025
Vendor
aio-libs
Product
aiohttp
Classifications
CWE-61, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2025Record 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=>= 3.10.0b1, < 3.10.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

aio-libs · aiohttpversion=>= 3.10.0b1, < 3.10.2

Published CVSS scores

4.8GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-61UNIX Symbolic Link (Symlink) Following
T1190Exploit Public-Facing Application

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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