CVE-2026-76805Network attack vectorHinoki check available

Environment-variable disclosure via repeated fuzz evaluation

Published Sep 22, 2026 · Updated Sep 22, 2026

Expression injection in ProjectDiscovery Nuclei before 3.10.0 allows remote attackers to read scanner-host environment variables. The DAST/fuzz path in pkg/fuzz/parts.go evaluates extractor-substituted response data again, reinterpreting attacker markers as template syntax. Exploitation requires a multi-step DAST or fuzz template that reuses internal extractor output and explicit -env-vars enablement; disclosed data can include credentials, API keys, and tokens.

CVSS severity5.3
Medium
EPSS probability0.41%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Expression injection in ProjectDiscovery Nuclei before 3.10.0 allows remote attackers to read scanner-host environment variables. The DAST/fuzz path in pkg/fuzz/parts.go evaluates extractor-substituted response data again, reinterpreting attacker markers as template syntax. Exploitation requires a multi-step DAST or fuzz template that reuses internal extractor output and explicit -env-vars enablement; disclosed data can include credentials, API keys, and tokens.

The record

CVE
CVE-2026-76805
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
ProjectDiscovery
Product
Nuclei
Classifications
CWE-200, T1552
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 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, < 3.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ProjectDiscovery · Nucleiversion=>= 3.0.0, < 3.10.0

Published CVSS scores

5.3GitHub Security AdvisoryCVSS:3.1/AV:N/AC:H/PR:N/UI:R/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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552Unsecured Credentials

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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