CVE-2026-48788
XSS in Remark42 image proxy via content-type spoofing (1.6.0–1.15.0).
Is CVE-2026-48788 being exploited?
Not confirmed. CVE-2026-48788 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 0.25% probability of exploitation in the next 30 days.
How severe is CVE-2026-48788?
CVE-2026-48788 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-2026-48788?
Yes. A fix has been recorded for CVE-2026-48788. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-48788 affect?
CVE-2026-48788 affects Remark42 self-hosted comment engine (1.6.0–1.15.0). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-48788?
Upgrade to 1.16.0 to fix.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote XSS: attacker runs JS in the victim's browser within Remark42 origin; may steal data or take actions.
Patch when possible
- affected>= 1.6.0 and < 1.16.0
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.