CVE-2023-41265: Qlik Sense HTTP Tunneling Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 7 Dec 2023, 100 days after the CVE record was published.

How likely is exploitation in the next 30 days?

88.2%

EPSS score, percentile 99.8 of all scored records

How severe?

9.6 Critical

CVSS v3.1 base score, given by the CNA

What should I do?

CISA deadline 28 Dec 2023. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Not stated. The CVE record gives vendor and product as “n/a” and the version as “unspecified”.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 28 December 2023.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

• https://community.qlik.com/t5/Official-Support-Articles/Critical-Security-fixes-for-Qlik-Sense-Enterprise-for-Windows/ta-p/2110801
• https://nvd.nist.gov/vuln/detail/CVE-2023-41265

Affected products and versions

The CVE record does not name affected products or versions: vendor and product are “n/a” and the version is “unspecified”.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Qlik Sense contains an HTTP tunneling vulnerability that allows an attacker to escalate privileges and execute HTTP requests on the backend server hosting the software.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2023-41265 to its Known Exploited Vulnerabilities (KEV) catalog on 7 Dec 2023.
• CISA marks it as known to be used in ransomware campaigns.
• The due date CISA sets for the required action is 28 Dec 2023.
• The CVE record was published on 29 Aug 2023, 100 days before it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 9.6 (Critical), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 88.2% (percentile 99.8), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

An HTTP Request Tunneling 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 a remote attacker to elevate their privilege by tunneling HTTP requests in the raw HTTP request. This allows them to send requests that get executed by the backend server hosting the repository application. This is fixed in August 2023 IR, May 2023 Patch 4, February 2023 Patch 8, November 2022 Patch 11, and August 2022 Patch 13.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

References

• community.qlik.com
• community.qlik.com

More exploited Qlik vulnerabilities

• CVE-2023-48365: Qlik Sense HTTP Tunneling Vulnerability (added 13 Jan 2025)
• CVE-2023-41266: Qlik Sense Path Traversal Vulnerability (added 7 Dec 2023)