CVE-2020-5403

mediumpriority · track · 30EPSS 0.011 · 67 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.15% (67th) EPSS

CVSS 5 · medium

Is it mine?

7 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.06.5mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.06.5mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Hsecondary · security@pivotal.ioexploitability 2.8 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-755USprimaryCWE-20USCWE-20USCWE-755US

affected products (7)

Products and version ranges known to be affected.

Pivotal Reactor Netty≤ 0.9 v0.9.4.RELEASEenisa_euvdEU
Pivotal Reactor Netty≤ 0.9 v0.9.3.RELEASEenisa_euvdEU
broadcom reactor netty= 0.9.3nvdUScpe:2.3:a:broadcom:reactor_netty:*:*:*:*:*:*:*:*
broadcom reactor netty= 0.9.4nvdUScpe:2.3:a:broadcom:reactor_netty:*:*:*:*:*:*:*:*
pivotal reactor netty= 0.9.3nvdUScpe:2.3:a:pivotal:reactor_netty:*:*:*:*:*:*:*:*
pivotal reactor netty= 0.9.4nvdUScpe:2.3:a:pivotal:reactor_netty:*:*:*:*:*:*:*:*
Maven io.projectreactor.netty:reactor-netty-http0.9.3 → 0.9.5osvUSpkg:maven/io.projectreactor.netty/reactor-netty-http

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-hp5x-rqf7-43vfImproper Handling of Exceptional Conditions and Improper Input Validation in Reactor Netty2022-02-10ghsa · osvUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2020-03-03modified 2026-06-17

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+700 more

references (4)

External citations — patches, advisories, analysis.

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