Is CVE-2026-43891 actively exploited?

No active exploitation of CVE-2026-43891 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-43891 be exploited remotely?

Yes. CVE-2026-43891 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-43891?

CVE-2026-43891 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-43891

HIGH

CVE-2026-43891

CWE-73Published: May 12, 2026· Updated: May 15, 2026

7.5

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:9.0th

Official Description

changedetection.io is a free open source web page change detection tool. Prior to 0.55.1, the vulnerability is caused by trusting attacker-controlled snapshot paths restored from backup files. The vulnerable flow starts in the backup restore logic. When a backup ZIP is restored, the application extracts the archive and copies each restored watch UUID directory directly into the live datastore using shutil.copytree(entry.path, dst_dir). This preserves attacker-controlled files inside the restored watch directory, including history.txt. After restore, the application parses history.txt in the watch history property and returns the contents of the targeted local file. This vulnerability is fixed in 0.55.1.

NVD Source

Technical Analysis

CVE-2026-43891 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.