CVE-2026-55698
pnpm lockfile can trigger code execution during install if tampered (pre-patch).
Is CVE-2026-55698 being exploited?
Not confirmed. CVE-2026-55698 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.30% probability of exploitation in the next 30 days.
How severe is CVE-2026-55698?
CVE-2026-55698 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-55698?
Yes. A fix has been recorded for CVE-2026-55698. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-55698 affect?
CVE-2026-55698 affects pnpm <= 10.34.1, pnpm <= 11.5.2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-55698?
Upgrade to pnpm 10.34.2 or 11.5.3+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Code execution at install via a malicious lockfile, bypassing normal resolution.
Patch when possible
- affected< 10.34.2
- affected>= 11.0.0 and < 11.5.3
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.