CVE-2026-56291

Balbooa Forms arbitrary file upload, confirmed exploited in the wild.

Balbooa Forms contains an unrestricted upload of file with dangerous type vulnerability that allows an unauthenticated arbitrary file upload which could allow uploading of executable files leading to full RCE.

Check your domain free How we watch for this

15%chance of exploitation in the next 30 days (EPSS), 96th percentile

10 Juladded to CISA's Known Exploited Vulnerabilities list, 2026

13 Julfederal remediation deadline, already passed

Passedpast the deadline: patch now

CISA's name for it	Balbooa Forms Unrestricted Upload of File with Dangerous Type Vulnerability
Vendor and product	Balbooa · Forms
Type	arbitrary file upload · CWE-434
Exploited	Confirmed by CISA listed 10 July 2026
Likelihood	one of the most likely to be exploited of every vulnerability tracked
Deadline	13 July 2026 · already passed
Used in ransomware	Not reported
Advisories	www.balbooa.com ↗ · www.cisa.gov ↗ · www.cisa.gov ↗ · nvd.nist.gov ↗

What to do

Three steps, in this order

Step 1

Apply the vendor's fix or mitigation; CISA lists only vulnerabilities seen exploited.

Step 2

If you cannot patch now, restrict network access to the affected product.

Step 3

Check for signs of compromise since the date it was added to the list.

CISA's required action	Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

CISA's required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Is it on your estate?

Know before someone else finds it

Threat Landscape Monitoring fingerprints the software your internet-facing hosts disclose and matches it, every day, against this list and the exploitation scores. When a new entry touches something you run, you are told once, with the host and the fix. The free plan covers one domain.

Start free with one domain Run the free domain check

Questions

CVE-2026-56291 in short

Is CVE-2026-56291 being exploited?

Yes. CISA added CVE-2026-56291 to its Known Exploited Vulnerabilities catalogue on 10 July 2026, which it does only on evidence of exploitation in the wild.

What is the CISA deadline for CVE-2026-56291?

US federal agencies must remediate it by 13 July 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.

How likely is CVE-2026-56291 to be exploited in the next 30 days?

FIRST's Exploit Prediction Scoring System gives it 15%, the 96th percentile of every CVE it scores.

How do I fix CVE-2026-56291?

Apply the vendor's fix or mitigation; CISA lists only vulnerabilities seen exploited. If you cannot patch now, restrict network access to the affected product. Check for signs of compromise since the date it was added to the list.

Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.