How severe is CVE-2026-41645?

CVE-2026-41645 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-41645 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41645?

CVE-2026-41645 affects Projectdiscovery Nuclei. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41645?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-41645 have an EU (EUVD) identifier?

Yes. CVE-2026-41645 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28498.

When was CVE-2026-41645 published?

CVE-2026-41645 was published on 2026-05-08 and last updated on 2026-06-17.

CVE-2026-41645

CVE-2026-41645 is a medium-severity vulnerability in Projectdiscovery Nuclei with a CVSS 3.x base score of 5.3. 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-94.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28498
Weakness: CWE-94
Affected product: Projectdiscovery Nuclei
Published: 2026-05-08
Last modified: 2026-06-17

Description

Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From version 3.0.0 to before version 3.8.0, a vulnerability in Nuclei's expression evaluation engine makes it possible for a malicious target server to inject and execute supported DSL expressions. This happens when HTTP response data containing helper/function syntax gets reused by multi-step templates. If the -env-vars / -ev option is explicitly enabled, this can expose host environment variables. That option is off by default, so standard configurations are not affected by the information disclosure risk. This issue has been patched in version 3.8.0.

Frequently asked questions

What is CVE-2026-41645?: Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From version 3.0.0 to before version 3.8.0, a vulnerability in Nuclei's expression evaluation engine makes it possible for a malicious target server to inject and execute supported DSL expressions. This happens when HTTP response data containing helper/function syntax gets reused by multi-step templates. If the -env-vars / -ev option is explicitly enabled, this can expose host environment variables. That option is off by default, so standard configurations are not affected by the information disclosure risk. This issue has been patched in version 3.8.0.
How severe is CVE-2026-41645?: CVE-2026-41645 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-41645 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41645?: CVE-2026-41645 affects Projectdiscovery Nuclei. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41645?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-41645 have an EU (EUVD) identifier?: Yes. CVE-2026-41645 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28498.
When was CVE-2026-41645 published?: CVE-2026-41645 was published on 2026-05-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:projectdiscovery:nuclei:*:*:*:*:*:go:*:*

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