CVE-2020-7693: Incorrect handling of Upgrade header with the value websocket leads in crashing of containers hosting sockjs a

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MEDIUM 5.3REMOTEUPGRADE

CVE-2020-7693 is a medium-severity flaw (CVSS 5.3) affecting sockjs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect handling of Upgrade header with the value websocket leads in crashing of containers hosting sockjs apps. This affects the package sockjs before 0.3.20.

Why this priority

EPSS top 8%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.0% (top 8%)
CISA exploited list	No
Weakness	CWE-755
Published	2020-07-09
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: sockjs project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-07-09 14:15 UTCPublished CVE record published
2026-06-17 03:25 UTCUpdated Record last modified

sockjs project sockjs UPGRADE

Affected: < 0.3.20

Fixed in: 0.3.20

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls sockjs

2. UPGRADE to 0.3.20

npm install sockjs@">=0.3.20"

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2020-7693?

sockjs: upgrade to 0.3.20. Exact commands for each OS are on this page.

Is CVE-2020-7693 being exploited?

CVE-2020-7693 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-2020-7693 affect?

CVE-2020-7693 affects sockjs. Severity is medium (CVSS 5.3). Incorrect handling of Upgrade header with the value websocket leads in crashing of containers hosting sockjs apps. This affects the package sockjs before 0.3.20.

How urgent is CVE-2020-7693?

Priority 52/100. EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-8823 MEDIUM 6.1 UPGRADE htmlfile in lib/transport/htmlfile.js in SockJS before 0.3.0 is vulnerable to Reflected XSS via the /htmlfile

References

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