CVE-2026-41645

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 73% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this week
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
26.9%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 8, 2026

Advisory Details (6)

Auto-updated May 8, 2026
Patch available. Sources: github.
github Patch Available

Environment variable disclosure via Response-Derived DSL Expressions · Advisory · projectdiscovery/nuclei · GitHub

https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-jm34-66cf-qpvr
generic

Release v3.8.0 · projectdiscovery/nuclei · GitHub

https://github.com/projectdiscovery/nuclei/releases/tag/v3.8.0
generic

fix(expressions): avoid helper eval in literal checks by dwisiswant0 · Pull Request #7321 · projectdiscovery/nuclei · GitHub

https://github.com/projectdiscovery/nuclei/pull/7321
generic

fix(expressions): only eval template-authored expressions by dwisiswant0 · Pull Request #7221 · projectdiscovery/nuclei · GitHub

https://github.com/projectdiscovery/nuclei/pull/7221
generic

fix(expressions): only eval template-authored expressions (#7221) · projectdiscovery/nuclei@d221732 · GitHub

https://github.com/projectdiscovery/nuclei/commit/d2217320162d5782ca7cb95bef9dda17063818f3
generic

fix(expressions): avoid helper eval in literal checks (#7321) · projectdiscovery/nuclei@6c803c7 · GitHub

https://github.com/projectdiscovery/nuclei/commit/6c803c74d193f85f8a6d9803ce493fd302cad0eb

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/projectdiscovery/nuclei/v3—3.8.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 36× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 03:11 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
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  63. 2026-05-20 13:49 UTCEG score recompute
  64. 2026-05-20 11:22 UTCEPSS rescore
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Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-41645?
CVE-2026-41645 is a medium vulnerability published on May 8, 2026. 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…
When was CVE-2026-41645 disclosed?
CVE-2026-41645 was first published in the National Vulnerability Database on May 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41645 actively exploited?
CVE-2026-41645 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 26.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41645?
CVE-2026-41645 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-41645?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41645, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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