PatchTheCVECVE-2020-7658: meinheld prior to 1.0.2 is vulnerable to HTTP Request Smuggling
CVE-2020-7658 is a medium-severity flaw (CVSS 6.1) affecting meinheld. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
meinheld prior to 1.0.2 is vulnerable to HTTP Request Smuggling. HTTP pipelining issues and request smuggling attacks might be possible due to incorrect Content-Length and Transfer encoding header parsing.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.1 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.7% (top 47%) |
| CISA exploited list | No |
| Weakness | CWE-444 |
| Published | 2020-05-22 |
| 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-2020-7658?
meinheld: upgrade to 1.0.2. Exact commands for each OS are on this page.
Is CVE-2020-7658 being exploited?
CVE-2020-7658 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-2020-7658 affect?
CVE-2020-7658 affects meinheld. Severity is medium (CVSS 6.1). meinheld prior to 1.0.2 is vulnerable to HTTP Request Smuggling. HTTP pipelining issues and request smuggling attacks might be possible due to incorrect Content-Length and Transfer encoding header parsing.
How urgent is CVE-2020-7658?
Priority 35/100. No elevated risk signals yet.