CVE-2026-78902 json
Cross Site Scripting vulnerability in Netgate pfSense 26.03.1-RELEASE allows an attacker to execute arbitrary code via the pfBlockerNG pack…
published last mo. modified last mo. also EUVD-2026-87083
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 20%
- public exploits
- 0
- none known
Summary
Cross Site Scripting vulnerability in Netgate pfSense 26.03.1-RELEASE allows an attacker to execute arbitrary code via the pfBlockerNG package
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Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- last mo.
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- netspi.com https://www.netspi.com/blog/technical-blog/web-application-pentesting/cve-2026-78902-xss-to-rce-in-pfsense-with-one-dns-request/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
Sources
- CVE List CVE-2026-78902
- NVD CVE-2026-78902
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