Known exploited vulnerability · CISA KEV

CVE-2023-41266: Qlik Sense Path Traversal Vulnerability

Qlik Sense contains a path traversal vulnerability that allows a remote, unauthenticated attacker to create an anonymous session by sending maliciously crafted HTTP requests. This anonymous session could allow the attacker to send further requests to unauthorized endpoints.

CVE-2023-41266

Exploited in the wild. Fix this first.

CISA added it to the Known Exploited Vulnerabilities catalog on 2023-12-07: attackers are using it right now. It is known to be used in ransomware campaigns.

CISA KEV: Listed; Added 2023-12-07 · federal fix-by 2023-12-28
EPSS (30 days): 85%; Higher than 99.7% of CVEs · 2026-11-01
CVSS v3.1: 6.5 Medium; CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

What CISA says

Qlik Sense Path Traversal Vulnerability

Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

NVD description · published 2023-08-29

A path traversal vulnerability found in Qlik Sense Enterprise for Windows for versions May 2023 Patch 3 and earlier, February 2023 Patch 7 and earlier, November 2022 Patch 10 and earlier, and August 2022 Patch 12 and earlier allows an unauthenticated remote attacker to generate an anonymous session. This allows them to transmit HTTP requests to unauthorized endpoints. This is fixed in August 2023 IR, May 2023 Patch 4, February 2023 Patch 8, November 2022 Patch 11, and August 2022 Patch 13.

Full record on NVD

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How to check if you are exposed to CVE-2023-41266

Find every Qlik Sense system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
Compare each version with the fixed versions in the vendor advisory below. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2023-41266.

US federal agencies had to fix this by 2023-12-28. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Affected versions

Versions the National Vulnerability Database lists as vulnerable to CVE-2023-41266. Check the vendor advisory for the exact fixed builds before you sign anything off.

Product	Vulnerable versions
Qlik Sense	august_2022; august_2022-patch_1; august_2022-patch_10; august_2022-patch_11; august_2022-patch_12; august_2022-patch_2 and 30 more

Timeline

2023-08-29 · Published in the National Vulnerability Database
2023-12-07 · Added to CISA's Known Exploited Vulnerabilities catalog, 100 days after it was published
2023-12-28 · Fix-by date for US federal agencies, passed 1,039 days ago

Vendor advisories and fixes

https://community.qlik.com/t5/Official-Support-Articles/Critical-Security-fixes-for-Qlik-Sense-Enterprise-for-Windows/ta-p/2110801

Weakness type

CWE-20

More exploited Qlik vulnerabilities

CISA lists 3 exploited Qlik vulnerabilities. The closest matches:

Keep going

Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.