CVE-2026-31049: a CSV File · Improper Neutralization of Formula Elements
Source CVE Database V5
Not known to be exploited · CVSS 9.8 Critical.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 14 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
Until an official fix is released, users should consider restricting access to the Hostbill service, applying network-level protections, and monitoring for suspicious activity related to CSV registration inputs. Avoid importing untrusted CSV data. Follow vendor communications closely for updates.
Description
An issue in Hostbill v.2025-11-24 and 2025-12-01 allows a remote attacker to execute arbitrary code and escalate privileges via the CSV registration field
References
- hostbillapp.com/changelog (opens in a new tab)
- hostbillapp.com/release-notes/11-27-2025.html (opens in a new tab)
- blog.hostbillapp.com/2025/12/03/hostbill-security-advisory/ (opens in a new tab)
- hostbillapp.com/responsible-disclosure (opens in a new tab)
- hostbillapp.com/release-notes/12-01-2025.html (opens in a new tab)
- github.com/Muhammad5235/HostBill-CVEs-2025/blob/main/Missing%20Server-Side%20Validation/Registration%20fields%20%26%20Import%20Csv (opens in a new tab)