CVE-2023-41266Known exploitationNetwork attack vector

Unauthenticated endpoint access via unnormalized resource paths

Published Aug 29, 2023 · Updated Aug 5, 2026

Path traversal in the Qlik Sense Enterprise for Windows proxy allows remote attackers to access unauthorized endpoints via crafted HTTP paths. The proxy allowlists font-like resource paths without normalizing traversal segments before routing them to backend services. No authentication or anonymous-access configuration is required; the flaw creates an anonymous session and exposes otherwise restricted endpoints.

CVSS severity8.2
High
EPSS probability84.84%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in the Qlik Sense Enterprise for Windows proxy allows remote attackers to access unauthorized endpoints via crafted HTTP paths. The proxy allowlists font-like resource paths without normalizing traversal segments before routing them to backend services. No authentication or anonymous-access configuration is required; the flaw creates an anonymous session and exposes otherwise restricted endpoints.

The record

CVE
CVE-2023-41266
Published
Aug 29, 2023
Updated
Aug 5, 2026
Vendor
Qlik
Product
Qlik Sense
Classifications
CWE-20, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 7, 2023Exploitation reportedCISA Known Exploited Vulnerabilities catalog listing
  3. Aug 5, 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 <=august_2022
  2. Affected versionversion=0 <=february_2023
  3. Affected versionversion=0 <=may_2023
  4. Affected versionversion=0 <=november_2022

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qlik · Qlik Senseversion=0 <=august_2022; version=0 <=february_2023; version=0 <=may_2023; version=0 <=november_2022

Published CVSS scores

8.2QlikCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
6.5NISTCVSS:3.1/AV:N/AC:L/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 exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
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.

Reported exploitation

Technologies

Your stack

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Your stack

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