How severe is CVE-2026-8500?

CVE-2026-8500 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-8500 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-8500?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-8500 have an EU (EUVD) identifier?

Yes. CVE-2026-8500 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30206.

When was CVE-2026-8500 published?

CVE-2026-8500 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-8500

CVE-2026-8500 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30206
Weakness: CWE-78
Published: 2026-05-13
Last modified: 2026-06-17

Description

Web::Passwd versions through 0.03 for Perl is vulnerable to RCE. Web::Passwd is a small CGI application for managing htpasswd files using the htpasswd command. The user parameter is not validated or escaped, and is used as the last argument on the command line, allowing for command injection.

Frequently asked questions

What is CVE-2026-8500?: Web::Passwd versions through 0.03 for Perl is vulnerable to RCE. Web::Passwd is a small CGI application for managing htpasswd files using the htpasswd command. The user parameter is not validated or escaped, and is used as the last argument on the command line, allowing for command injection.
How severe is CVE-2026-8500?: CVE-2026-8500 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-8500 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-8500?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-8500 have an EU (EUVD) identifier?: Yes. CVE-2026-8500 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30206.
When was CVE-2026-8500 published?: CVE-2026-8500 was published on 2026-05-13 and last updated on 2026-06-17.

References

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