CVE-2026-45087

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 1.1%, top 40% 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
Weaponized
10.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 10.0Exploit: NoneExposed: 0

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

Dalfox is a powerful open-source XSS scanner and utility focused on automation. Prior to 2.13.0, when dalfox is started in REST API server mode (dalfox server), the server binds to 0.0.0.0:6664 by default and requires no API key unless the operator explicitly passes --api-key. Because model.Options — including FoundAction and FoundActionShell — is deserialized directly from attacker-supplied JSON in POST /scan, and because dalfox.Initialize explicitly propagates those two fields into the final scan options without stripping them, any unauthenticated caller who can reach the server port can supply an arbitrary shell command that the dalfox process will execute on the host whenever a scan finding is triggered. This vulnerability is fixed in 2.13.0.

CVSS v3
10.0
EG Score
10.0(medium)
EPSS
60.4%
KEV
Not listed

Published

May 27, 2026

Last Modified

May 28, 2026

Advisory Details (2)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
github Patch Available🟡 PoC Available

GHSA: Unauthenticated Remote Code Execution via `found-action` in Dalfox Server Mode · Advisory · hahwul/dalfox · GitHub

https://github.com/hahwul/dalfox/security/advisories/GHSA-v25v-m36w-jp4h
github_release Patch Available

v2.13.0

Patch available: hahwul/dalfox v2.13.0

https://github.com/hahwul/dalfox/releases/tag/v2.13.0

Vendor Advisories for CVE-2026-45087(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/hahwul/dalfox/v2—2.13.0—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 70× 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.

Showing the most recent 100 of 193 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
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  1. 2026-06-29 14:04 UTCEG score recompute
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  25. 2026-06-24 14:05 UTCEPSS rescore
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  42. 2026-06-16 23:46 UTCEG score recompute
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  44. 2026-06-16 17:52 UTCEPSS rescore
  45. 2026-06-16 15:56 UTCEG score recompute
  46. 2026-06-16 09:57 UTCEG score recompute
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  50. 2026-06-15 17:49 UTCEPSS rescore
  51. 2026-06-15 13:20 UTCEG score recompute
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  53. 2026-06-15 02:57 UTCEG score recompute
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  62. 2026-06-13 19:42 UTCEG score recompute
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  67. 2026-06-12 23:12 UTCEPSS rescore
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  71. 2026-06-12 12:33 UTCEG score recompute
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  74. 2026-06-12 00:51 UTCEG score recompute
  75. 2026-06-11 20:57 UTCEG score recompute

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitexploit/linux/http/dalfox_server_rce_cve_2026_45087✓ verified
    First seen May 7, 2026

    Dalfox Found-Action Deserialization RCE

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45087?
CVE-2026-45087 is a critical vulnerability published on May 27, 2026. Dalfox is a powerful open-source XSS scanner and utility focused on automation. Prior to 2.13.0, when dalfox is started in REST API server mode (dalfox server), the server binds to 0.0.0.0:6664 by default and requires no API key unless the operator explicitly passes --api-key. Because model.Options…
When was CVE-2026-45087 disclosed?
CVE-2026-45087 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on May 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45087 actively exploited?
CVE-2026-45087 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 60.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45087?
CVE-2026-45087 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-45087?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45087, 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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