CVE-2026-73055
Tilde injection in Shescape leaks home dirs and can redirect command targets.
Is CVE-2026-73055 being exploited?
Not confirmed. CVE-2026-73055 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 0.21% probability of exploitation in the next 30 days.
How severe is CVE-2026-73055?
CVE-2026-73055 is rated Critical with a CVSS score of 9.3. 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-2026-73055?
Yes. A fix has been recorded for CVE-2026-73055. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-73055 affect?
CVE-2026-73055 affects Shescape < 2.1.15, Shescape 3.0.0 - 3.0.1, Unix systems where /bin/sh is BusyBox and shell set to sh/true. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-73055?
Upgrade to Shescape >=2.1.15 or >=3.0.2; avoid escape/escapeAll with untrusted input.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attackers can inject ~ in assignment contexts to disclose user home directories and alter command target paths, causing data exposure or file/operation misdirection.
Immediate action required
- affected< 2.1.15
- affected>= 3.0.0 and < 3.0.2
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.