CVE-2026-52885

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Source

https://cve.org/CVERecord?id=CVE-2026-52885

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52885.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-52885

Aliases

GHSA-qm4c-qg8p-qfcr

Published

2026-06-26T20:19:04.456Z

Modified

2026-07-15T19:48:09.974457Z

Severity

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

Summary

Notepad++ TOCTOU: HMAC Checks Disk, Executes from Memory

Details

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.4, NppCommands.cpp checks the HMAC of the on-disk shortcuts.xml at the moment a user command fires (Time-of-Check). However, the command payload is taken from the in-memory _userCommands vector, which is populated at application startup and never re-synchronized with the on-disk file (Time-of-Use). Swapping shortcuts.xml between startup and command execution causes the HMAC check to validate a clean file while a malicious command runs. An attacker with write access to shortcuts.xml places a malicious version on disk before launch, then immediately restores the legitimate file. The HMAC check at execution time validates the restored legitimate file (check passes), while the malicious payload executes from memory. This vulnerability is fixed in 8.9.6.4.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52885.json",
    "cwe_ids": [
        "CWE-367"
    ],
    "cna_assigner": "GitHub_M"
}

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

6ab5c2110168b4453443663d114ffc2088caae98

Fixed

4f7563c7c7f8ffa0d795ec86a7777067c7d644b5

Database specific

{
    "cpe": "cpe:2.3:a:notepad-plus-plus:notepad\\+\\+:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "8.9.6.4"
        }
    ]
}

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

Database specific

vanir_signatures

[
    {
        "source": "https://github.com/notepad-plus-plus/notepad-plus-plus/commit/6ab5c2110168b4453443663d114ffc2088caae98",
        "deprecated": false,
        "signature_version": "v1",
        "digest": {
            "function_hash": "219184586100220539672240753401781226053",
            "length": 2291.0
        },
        "id": "CVE-2026-52885-40398d30",
        "signature_type": "Function",
        "target": {
            "function": "AboutDlg::run_dlgProc",
            "file": "PowerEditor/src/WinControls/AboutDlg/AboutDlg.cpp"
        }
    },
    {
        "source": "https://github.com/notepad-plus-plus/notepad-plus-plus/commit/4f7563c7c7f8ffa0d795ec86a7777067c7d644b5",
        "deprecated": false,
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "127929633646921987814396737528644852996",
                "290894310495379845902728531785820152918",
                "279513998355383049374026875634215521488",
                "164506617345251224609481369476050892097",
                "692462126711959033219468651714966190"
            ]
        },
        "id": "CVE-2026-52885-6020be3b",
        "signature_type": "Line",
        "target": {
            "file": "PowerEditor/src/NppCommands.cpp"
        }
    },
    {
        "source": "https://github.com/notepad-plus-plus/notepad-plus-plus/commit/4f7563c7c7f8ffa0d795ec86a7777067c7d644b5",
        "deprecated": false,
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "47328615034110016216604070238396648852",
                "243985470432832094535403273245299872356",
                "338345801406602247742997799988639254607",
                "280840879427821103660213602170783703093",
                "110269011757098844526958154030893281808"
            ]
        },
        "id": "CVE-2026-52885-6eaf331c",
        "signature_type": "Line",
        "target": {
            "file": "PowerEditor/src/Parameters.cpp"
        }
    },
    {
        "source": "https://github.com/notepad-plus-plus/notepad-plus-plus/commit/4f7563c7c7f8ffa0d795ec86a7777067c7d644b5",
        "deprecated": false,
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "299507352803092293900004188244668001149",
                "94025935158844844736406527431803657362",
                "236336918866179776313491502453915694670",
                "319466044784689419016237333598692812069"
            ]
        },
        "id": "CVE-2026-52885-a9674931",
        "signature_type": "Line",
        "target": {
            "file": "PowerEditor/src/Parameters.h"
        }
    },
    {
        "source": "https://github.com/notepad-plus-plus/notepad-plus-plus/commit/4f7563c7c7f8ffa0d795ec86a7777067c7d644b5",
        "deprecated": false,
        "signature_version": "v1",
        "digest": {
            "function_hash": "59794531130702326458042737155916682116",
            "length": 109847.0
        },
        "id": "CVE-2026-52885-af85305c",
        "signature_type": "Function",
        "target": {
            "function": "Notepad_plus::command",
            "file": "PowerEditor/src/NppCommands.cpp"
        }
    },
    {
        "source": "https://github.com/notepad-plus-plus/notepad-plus-plus/commit/6ab5c2110168b4453443663d114ffc2088caae98",
        "deprecated": false,
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "114877192185801132542647388985508188971",
                "118927504421255850509002540442162311371",
                "46612156897676513270227421665238931887",
                "64036855656135695482607875833833083004"
            ]
        },
        "id": "CVE-2026-52885-ebfde83c",
        "signature_type": "Line",
        "target": {
            "file": "PowerEditor/src/WinControls/AboutDlg/AboutDlg.cpp"
        }
    },
    {
        "source": "https://github.com/notepad-plus-plus/notepad-plus-plus/commit/4f7563c7c7f8ffa0d795ec86a7777067c7d644b5",
        "deprecated": false,
        "signature_version": "v1",
        "digest": {
            "function_hash": "267883633059239834481796249523318967066",
            "length": 11311.0
        },
        "id": "CVE-2026-52885-f6fb2741",
        "signature_type": "Function",
        "target": {
            "function": "NppParameters::load",
            "file": "PowerEditor/src/Parameters.cpp"
        }
    }
]

vanir_signatures_modified

"2026-07-15T19:48:09Z"

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52885.json"