High [CVE-2026-55700] Unauthorized file modification via crafted package manifest
This high-severity Red Hat Linux advisory covers CVE-2026-55700.
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Summary
pnpm is a package manager. A crafted manifest could escape the selected download directory and overwrite another reachable file.
The merged fix validates both fields, derives one safe filename, and verifies the final destination before writing. This vulnerability is fixed in 11.5.3.
This could allow the attacker to write files to arbitrary locations on the system, leading to unauthorized modification of system files and potential integrity compromise. Red Hat severity: Important — CVSS 7.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L).
Weakness: CWE-22. Red Hat lists Red Hat AMQ Broker 7; Red Hat Build of Keycloak; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 21 days ago·verify at source
Mitigation
Upgrade to a fixed release: 11.5.3. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 21 days ago·verify at source
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