CVE-2022-35920Public exploitNetwork attack vector

File disclosure via encoded static-path separator

Published Aug 1, 2022 · Updated Apr 22, 2025

Path traversal in Sanic before 20.12.7, 21.0.0 through 21.12.1, and 22.0.0 through 22.6.0 allows remote attackers to read lateral files. The app.static handler checks the quoted path for ../ before URL decoding, so ..%2F introduces a separator after that traversal check. Exploitation requires a static-directory route and a known or guessed lateral path; the resolved-path prefix check still blocks escape to parent directories.

CVSS severity8.3
High
EPSS probability1.14%
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 Sanic before 20.12.7, 21.0.0 through 21.12.1, and 22.0.0 through 22.6.0 allows remote attackers to read lateral files. The app.static handler checks the quoted path for ../ before URL decoding, so ..%2F introduces a separator after that traversal check. Exploitation requires a static-directory route and a known or guessed lateral path; the resolved-path prefix check still blocks escape to parent directories.

The record

CVE
CVE-2022-35920
Published
Aug 1, 2022
Updated
Apr 22, 2025
Vendor
Sanic Community Organization
Product
Sanic
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 1, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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=< 20.12.7
  2. Affected versionversion=>= 21.0.0, < 21.12.2
  3. Affected versionversion=>= 22.0.0, < 22.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sanic Community Organization · Sanicversion=< 20.12.7; version=>= 21.0.0, < 21.12.2; version=>= 22.0.0, < 22.6.1

Published CVSS scores

8.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
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.

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-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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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