CVE-2020-7779: All versions of package djvalidator are vulnerable to Regular Expression Denial of Service (ReDoS) by sending

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MEDIUM 5.3REMOTEMITIGATE

CVE-2020-7779 is a medium-severity flaw (CVSS 5.3) affecting djvalidator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

All versions of package djvalidator are vulnerable to Regular Expression Denial of Service (ReDoS) by sending crafted invalid emails - for example, --@------------------------------------------------------------------------------------------------------------------------!.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-400
Published	2020-11-26
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: djvalidator project

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

Am I affected?

Timeline

2020-11-26 11:15 UTCPublished CVE record published
2026-06-17 03:25 UTCUpdated Record last modified

djvalidator project djvalidator MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy djvalidator || rpm -q djvalidator || djvalidator --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2020-7779?

djvalidator: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-7779 being exploited?

CVE-2020-7779 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-2020-7779 affect?

CVE-2020-7779 affects djvalidator. Severity is medium (CVSS 5.3). All versions of package djvalidator are vulnerable to Regular Expression Denial of Service (ReDoS) by sending crafted invalid emails - for example, --@-----------------------------------------------------------------------------------------

How urgent is CVE-2020-7779?

Priority 48/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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