PatchTheCVECVE-2022-28229: The hash functionality in userver before 42059b6319661583b3080cab9b595d4f8ac48128 allows attackers to cause a
CVE-2022-28229 is a high-severity flaw (CVSS 7.5) affecting userver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The hash functionality in userver before 42059b6319661583b3080cab9b595d4f8ac48128 allows attackers to cause a denial of service via crafted HTTP request, involving collisions.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.8% (top 44%) |
| CISA exploited list | No |
| Weakness | CWE-400 |
| Published | 2022-12-23 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2022-28229?
userver: upgrade to 2022-11-18. Exact commands for each OS are on this page.
Is CVE-2022-28229 being exploited?
CVE-2022-28229 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2022-28229 affect?
CVE-2022-28229 affects userver. Severity is high (CVSS 7.5). The hash functionality in userver before 42059b6319661583b3080cab9b595d4f8ac48128 allows attackers to cause a denial of service via crafted HTTP request, involving collisions.
How urgent is CVE-2022-28229?
Priority 45/100. High severity; Remotely exploitable, no login, no user action