PYSEC-2026-30
Vulnerability from pysec - Published: 2026-05-12 18:17 - Updated: 2026-05-20 09:18
VLAI?
Details
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.
Severity ?
7.5 (High)
Impacted products
| Name | purl | changedetection-io | pkg:pypi/changedetection-io |
|---|
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "changedetection-io",
"purl": "pkg:pypi/changedetection-io"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.55.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.38.2",
"0.39",
"0.39.1",
"0.39.10",
"0.39.10.post1",
"0.39.10.post2",
"0.39.11",
"0.39.12",
"0.39.13",
"0.39.13.1",
"0.39.14",
"0.39.14.1",
"0.39.15",
"0.39.16",
"0.39.17",
"0.39.17.1",
"0.39.17.2",
"0.39.18",
"0.39.19",
"0.39.19.1",
"0.39.2",
"0.39.20",
"0.39.20.1",
"0.39.20.2",
"0.39.20.3",
"0.39.20.4",
"0.39.21",
"0.39.21.1",
"0.39.22",
"0.39.22.1",
"0.39.3",
"0.39.4",
"0.39.5",
"0.39.6",
"0.39.7",
"0.39.8",
"0.39.9",
"0.40.0",
"0.40.0.1",
"0.40.0.2",
"0.40.0.3",
"0.40.0.4",
"0.40.1.0",
"0.40.1.1",
"0.40.2",
"0.40.3",
"0.41",
"0.41.1",
"0.42",
"0.42.1",
"0.42.2",
"0.42.3",
"0.43.1",
"0.43.2",
"0.44",
"0.44.1",
"0.45",
"0.45.1",
"0.45.11",
"0.45.12",
"0.45.13",
"0.45.14",
"0.45.15",
"0.45.16",
"0.45.17",
"0.45.18",
"0.45.19",
"0.45.2",
"0.45.20",
"0.45.21",
"0.45.22",
"0.45.23",
"0.45.24",
"0.45.25",
"0.45.26",
"0.45.3",
"0.45.4",
"0.45.5",
"0.45.6",
"0.45.7",
"0.45.7.1",
"0.45.7.2",
"0.45.7.3",
"0.45.8",
"0.45.8.1",
"0.45.9",
"0.46.0",
"0.46.1",
"0.46.2",
"0.46.3",
"0.46.4",
"0.47.0",
"0.47.1",
"0.47.2",
"0.47.3",
"0.47.4",
"0.47.5",
"0.47.6",
"0.48.0",
"0.48.1",
"0.48.2",
"0.48.3",
"0.48.4",
"0.48.5",
"0.48.6",
"0.49.0",
"0.49.1",
"0.49.10",
"0.49.12",
"0.49.13",
"0.49.14",
"0.49.15",
"0.49.16",
"0.49.17",
"0.49.18",
"0.49.2",
"0.49.3",
"0.49.4",
"0.49.5",
"0.49.6",
"0.49.7",
"0.49.8",
"0.49.9",
"0.50.1",
"0.50.10",
"0.50.11",
"0.50.12",
"0.50.13",
"0.50.14",
"0.50.15",
"0.50.16",
"0.50.17",
"0.50.18",
"0.50.19",
"0.50.2",
"0.50.20",
"0.50.21",
"0.50.22",
"0.50.23",
"0.50.24",
"0.50.25",
"0.50.26",
"0.50.27",
"0.50.28",
"0.50.29",
"0.50.3",
"0.50.30",
"0.50.31",
"0.50.32",
"0.50.33",
"0.50.34",
"0.50.35",
"0.50.37",
"0.50.38",
"0.50.39",
"0.50.4",
"0.50.40",
"0.50.41",
"0.50.42",
"0.50.43",
"0.50.5",
"0.50.6",
"0.50.7",
"0.50.8",
"0.50.9",
"0.51.0",
"0.51.1",
"0.51.2",
"0.51.3",
"0.51.4",
"0.52.1",
"0.52.2",
"0.52.3",
"0.52.4",
"0.52.5",
"0.52.6",
"0.52.7",
"0.52.8",
"0.52.9",
"0.53.1",
"0.53.2",
"0.53.3",
"0.53.4",
"0.53.5",
"0.53.6",
"0.53.7",
"0.54.1",
"0.54.10",
"0.54.2",
"0.54.3",
"0.54.4",
"0.54.5",
"0.54.6",
"0.54.7",
"0.54.8",
"0.54.9"
]
}
],
"aliases": [
"CVE-2026-43891"
],
"details": "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.",
"id": "PYSEC-2026-30",
"modified": "2026-05-20T09:18:54.474633Z",
"published": "2026-05-12T18:17:28.493Z",
"references": [
{
"type": "EVIDENCE",
"url": "https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-8757-69j2-hx56"
},
{
"type": "EVIDENCE",
"url": "https://github.com/pocket-id/pocket-id/security/advisories/GHSA-w6p7-2fxx-4f44"
}
],
"related": [
"GHSA-8757-69j2-hx56",
"GHSA-w6p7-2fxx-4f44"
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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