CVE-2026-30058: CVE-2026-30058 is a high-severity
Source CVE Database V5
Not known to be exploited · CVSS 7.5 High.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 39% 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:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 27 Aug 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 a fix is available, consider restricting access to the HTTPModifySubscription handler to trusted sources and monitor for unusual input patterns targeting this endpoint.
Description
CVE-2026-30058 is a high-severity vulnerability in free5gc version 4.0.1, involving improper input validation in the HTTPModifySubscription handler. This flaw allows attackers to cause a denial of service (DoS) by sending crafted inputs. There is no confirmed patch or official remediation available at this time. The vulnerability does not impact confidentiality or integrity but can disrupt service availability.