CVE-2026-42353
Path traversal/SSRF via unsanitized inputs in i18next-http-middleware (pre-3.9.3).
Is CVE-2026-42353 being exploited?
Not confirmed. CVE-2026-42353 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 0.39% probability of exploitation in the next 30 days.
How severe is CVE-2026-42353?
CVE-2026-42353 is rated High with a CVSS score of 8.2. 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-2026-42353?
Yes. A fix has been recorded for CVE-2026-42353. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-42353 affect?
CVE-2026-42353 affects i18next-http-middleware < 3.9.3. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-42353?
Upgrade to 3.9.3+ immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker-controlled language/namespace triggers path traversal or SSRF via backend load, risking RCE depending on backend.
Patch when possible
- affected< 3.9.3
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.