CVE-2026-41282Public exploitNetwork attack vector

Environment-variable disclosure via response-derived DSL evaluation

Published Apr 20, 2026 · Updated Apr 20, 2026

DSL expression injection in ProjectDiscovery Nuclei 3 before 3.8.0 allows remote attackers to read host environment variables. The expressions.Evaluate function replaces placeholders and then rescans response-derived extractor values, interpreting attacker-supplied braces as DSL syntax. Disclosure requires an operator or SDK integration to enable environment variables and reuse untrusted response data in a later template request; the option is disabled by default.

CVSS severity4.0
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DSL expression injection in ProjectDiscovery Nuclei 3 before 3.8.0 allows remote attackers to read host environment variables. The expressions.Evaluate function replaces placeholders and then rescans response-derived extractor values, interpreting attacker-supplied braces as DSL syntax. Disclosure requires an operator or SDK integration to enable environment variables and reuse untrusted response data in a later template request; the option is disabled by default.

The record

CVE
CVE-2026-41282
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
ProjectDiscovery
Product
Nuclei
Classifications
CWE-94, T1552
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0.0 <3.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ProjectDiscovery · Nucleiversion=3.0.0 <3.8.0

Published CVSS scores

4.0MITRECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
5.3GitHub Security AdvisoryCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1552Unsecured Credentials

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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