CVE-2020-5403
No exploitation reported by the sources we read.
- Published2020-03-03
- WeaknessCWE-20 · CWE-755
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Reactor Netty HttpServer, versions 0.9.3 and 0.9.4, is exposed to a URISyntaxException that causes the connection to be closed prematurely instead of producing a 400 response.
Timeline
dates in UTC- 2020-03-0319:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-5403?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-5403?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 0.9 | = 0.9.3 | no fix published | NVD |
| 0.9 | = 0.9.4 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 0.9 | ≥ 0.9.3, < 0.9.5 | 0.9.5 | OSV |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- pivotal.ioVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2020-03-03
- Last Modified
- 2026-09-04
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-5403?
Is CVE-2020-5403 actively exploited?
What is the CVSS score for CVE-2020-5403?
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