CVE-2026-28813
JSON Hijacking in Apache JSPWiki ≤2.12.3 enables CSRF by abusing JSON responses.
Is CVE-2026-28813 being exploited?
Not confirmed. CVE-2026-28813 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 0.19% probability of exploitation in the next 30 days.
How severe is CVE-2026-28813?
CVE-2026-28813 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-2026-28813?
Yes. A fix has been recorded for CVE-2026-28813. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-28813 affect?
CVE-2026-28813 affects Apache JSPWiki ≤2.12.3. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-28813?
Upgrade to JSPWiki 2.12.4 and verify CSRF protections and admin activity
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
JSON Hijacking enables CSRF; attackers can perform actions as authenticated users, modify pages, change settings, or inject content.
Patch when possible
- affected< 2.12.4
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.