CVE Explorer

CVE-2026-52884

Notepad++ is a free and open-source source code editor. In v8.9.6.1, isInTrustedDirectory() does NOT canonicalize the path before checking. It uses a prefix-based check (PathIsPrefix() or equivalent) that matches paths starting with trusted directory strings. A path traversal using ..\..\ after a trusted directory prefix passes the check while resolving to an untrusted location. The CVE-2026-48800 patch adds isInTrustedDirectory() validation in Command::run() (RunDlg.cpp) before calling ShellExe

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2c3a23724940edfa3a5af7ed36d9b2e0249bd933954e1913a40e8caa41876307

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"notepad-plus-plus","vendor":"notepad-plus-plus","versions":[{"status":"affected","version":"= 8.9.6.1"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:cb2d5ae53d7a1921a9e4d582edaa023645fa1ba7d473ace7e6d118f8a95e924f · sha256:d182617895b0b82e… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:cb2d5ae53d7a1921a9e4d582edaa023645fa1ba7d473ace7e6d118f8a95e924f · sha256:d182617895b0b82e… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-42","description":"CWE-42: Path Equivalence: 'filename.' (Trailing Dot)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:cb2d5ae53d7a1921a9e4d582edaa023645fa1ba7d473ace7e6d118f8a95e924f · sha256:d182617895b0b82e… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/notepad-plus-plus/notepad-plus-plus/commit/ea1508855e9c4528f6198ce9d345f13cb759ebf4","tags":["x_refsource_MISC"],"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/commit/ea1508855e9c4528f6198ce9d345f13cb759ebf4"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:cb2d5ae53d7a1921a9e4d582edaa023645fa1ba7d473ace7e6d118f8a95e924f · sha256:d182617895b0b82e… · /containers/cna/references/1

{"name":"https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-p58x-r3c9-x9p6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-p58x-r3c9-x9p6"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:cb2d5ae53d7a1921a9e4d582edaa023645fa1ba7d473ace7e6d118f8a95e924f · sha256:d182617895b0b82e… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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