CVE-2026-52886

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Source

https://cve.org/CVERecord?id=CVE-2026-52886

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52886.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-52886

Aliases

GHSA-rqfm-pw34-r7j6

Published

2026-08-17T20:09:32Z

Modified

2026-09-11T08:19:24Z

Severity

5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

Notepad++: session.xml backupFilePath starts_with Bypass

Details

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, Notepad++ validates the backupFilePath attribute from session.xml with std::wstring::starts_with against the expected backup directory without path normalization, allowing parent-directory sequences during snapshot-mode restoration to read an arbitrary user-readable file outside the backup directory into an editor tab. This issue is fixed in version 8.9.7.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52886.json"
}

References

Affected packages

Git / github.com/notepad-plus-plus/notepad-plus-plus

Affected ranges

Type

GIT

Repo

https://github.com/notepad-plus-plus/notepad-plus-plus

Events

Introduced

Fixed

7e66f36db666a13b09fb5c31232ab2ca1c2ebccc

Fixed

6634650414ff91220a4c353b7fe5ad741af0f9f9

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "8.9.7"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

7.*

7.2.2

7.3.1

v5.*

v5.4.2

v5.4.3

v5.4.4

v5.4.5

v5.5

v5.5.1

v5.6

v5.6.1

v5.6.2

v5.6.3

v5.6.4

v5.6.5

v5.6.6

v5.6.7

v5.6.8

v5.7

v5.8

v5.8.1

v5.8.2

v5.8.3

v5.8.4

v5.8.5

v5.8.6

v5.8.7

v5.9

v5.9.1

v5.9.2

v5.9.3

v5.9.4

v5.9.5

v5.9.6

v5.9.6.1

v5.9.6.2

v5.9.7

v5.9.8

Other

v6.*

v6.1

v6.1.1

v6.1.2

v6.1.3

v6.1.4

v6.1.5

v6.1.6

v6.1.7

v6.1.8

v6.2

v6.2.1

v6.2.2

v6.2.3_-_End_of_World_Edition

v6.3

v6.3.1

v6.3.2

v6.3.3

v6.4

v6.4.1

v6.4.2

v6.4.3

v6.4.4

v6.4.5

v6.5

v6.5.1

v6.5.2

v6.5.3

v6.5.4

v6.5.5

v6.6

v6.6.1

v6.6.2

v6.6.3

v6.6.4

v6.6.6_-_Friday_the_13th_edition

v6.6.7

v6.6.8

v6.6.9

v6.7

v6.7.1

v6.7.2

v6.7.3

v6.7.4_-_Je_suis_Charlie_edition

v6.7.5

v6.7.7

v6.7.8

v6.7.8.1

v6.7.8.2

v6.7.9

v6.7.9.1

v6.7.9.2

v6.8

v6.8.1

v6.8.2

v6.8.3

v6.8.4

v6.8.5

v6.8.6

v6.8.7

v6.8.8

v6.8.9

v6.9

v6.9.1

v6.9.2

v7.*

v7.1

v7.2

v7.2.1

v7.2.2

v7.3

v7.3.1

v7.3.2

v7.3.3

v7.4

v7.4.1

v7.4.2

v7.5.1

v7.5.2

v7.5.3

v7.5.4

v7.5.5

v7.5.6

v7.5.7

v7.5.8

v7.5.9

v7.6

v7.6.1

v7.6.2

v7.6.3

v7.6.4

v7.6.5

v7.6.6

v7.7

v7.7.1

v7.8

v7.8.1

v7.8.2

v7.8.3

v7.8.4

v7.8.5

v7.8.6

v7.8.7

v7.8.8

v7.8.9

v7.9

v7.9.1

v7.9.2

v7.9.3

v7.9.4

v7.9.5

v8.*

v8.1

v8.1.1

v8.1.2

v8.1.3

v8.1.4

v8.1.5

v8.1.6

v8.1.7

v8.1.8

v8.1.9

v8.1.9.1

v8.1.9.2

v8.1.9.3

v8.2

v8.2.1

v8.3

v8.3.1

v8.3.2

v8.3.3

v8.4

v8.4.1

v8.4.2

v8.4.3

v8.4.4

v8.4.5

v8.4.6

v8.4.7

v8.4.8

v8.4.9

v8.5

v8.5.1

v8.5.2

v8.5.3

v8.5.4

v8.5.5

v8.5.6

v8.5.7

v8.5.8

v8.6

v8.6.1

v8.6.2

v8.6.3

v8.6.4

v8.6.5

v8.6.6

v8.6.7

v8.6.8

v8.6.9

v8.7

v8.7.1

v8.7.2

v8.7.3

v8.7.4

v8.7.5

v8.7.6

v8.7.7

v8.7.8

v8.7.9

v8.8

v8.8.1

v8.8.2

v8.8.3

v8.8.4

v8.8.5

v8.8.6

v8.8.7

v8.8.8

v8.8.9

v8.9

v8.9.1

v8.9.2

v8.9.3

v8.9.4

v8.9.5

v8.9.6

v8.9.6.1

v8.9.6.2

v8.9.6.4

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52886.json"

vanir_signatures

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                "234073119568777317145818912969928629253"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-52886-37fc05c0",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/notepad-plus-plus/notepad-plus-plus/commit/7e66f36db666a13b09fb5c31232ab2ca1c2ebccc",
        "target": {
            "file": "PowerEditor/src/Parameters.cpp"
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        "source": "https://github.com/notepad-plus-plus/notepad-plus-plus/commit/6634650414ff91220a4c353b7fe5ad741af0f9f9",
        "target": {
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            "function": "AboutDlg::run_dlgProc"
        }
    },
    {
        "deprecated": false,
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        "target": {
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]

vanir_signatures_modified

"2026-09-11T08:19:24Z"