GHSA-g2gp-3wwq-f4ph: league/commonmark: Denial of service via adjacent inline attribute blocks

high Affects league/commonmark. Feed 2026.10.29.4, updated 2026-10-29; published 2026-08-06.

league/commonmark: Denial of service via adjacent inline attribute blocks

Package: league/commonmark Composer
Affected versions: >=1.5.0 and <2.9.0
Fixed in: 2.9.0
Severity: high CVSS 7.5
Exploitation: not on CISA KEV
Published: 2026-08-06
Source: osv.dev

References

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

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pipx install phpwarden   &&   phpwarden deps composer.lock

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