CVE-2026-71415: Kirby: File upload permissions are not checked during processing of chunk data

high Affects getkirby/cms. Feed 2026.10.29.1, updated 2026-10-28; published 2026-08-31.

Kirby: File upload permissions are not checked during processing of chunk data

Package: getkirby/cms Composer
Affected versions: >=5.0.0 and <5.5.2
Fixed in: 5.5.2
Severity: high
Exploitation: not on CISA KEV · EPSS 0% (36.9th percentile)
Published: 2026-08-31
Source: osv.dev

References

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# PHP projects (recommended)
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# then
vendor/bin/phpwarden deps composer.lock

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pipx install phpwarden   &&   phpwarden deps composer.lock

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