CVE-2026-55795

MEDIUMCVSS · not yet scored
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: —CVSS v2: —Exploit: None knownExposed: 0

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

Craft Commerce: Coupon Code Brute-Force via Rate Limit Bypass

Summary

The CartController defines a RateLimiter behavior that is only activated when the 'number' POST/GET parameter is explicitly provided.

Details

When an attacker submits coupon codes against the session-based cart (without passing a 'number' parameter), no rate limiting is applied. This allows unlimited attempts to guess coupon codes.

Vulnerable Code

PoC

Complete instructions, including specific configuration details, to reproduce the vulnerability.

Impact

An attacker can enumerate all coupon codes through automated requests.

Remediation Apply rate limiting unconditionally on actionUpdateCart regardless of whether 'number' is present.

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
—
EPSS PROB
—
EPSS %ILE
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KEV
Not listed

Published

June 19, 2026

Last Modified

June 19, 2026

Vendor Advisories for CVE-2026-55795(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)
Packagist(1)
PackageVulnerable rangeFixed inDependents
craftcms/commerce4.0.0 ... 4.9.4 (73 versions)4.11.2—

Data Freshness Timeline

(refreshed 1× in last 7d / 3× 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. 2026-08-01 05:01 UTCEG score recompute
  2. 2026-07-26 16:47 UTCEG score recompute
  3. 2026-07-23 03:20 UTCEG score recompute
  4. 2026-06-19 21:23 UTCEG score recompute

Frequently asked(3)

What is CVE-2026-55795?
CVE-2026-55795 is a medium vulnerability published on June 19, 2026. Craft Commerce: Coupon Code Brute-Force via Rate Limit Bypass Summary The CartController defines a RateLimiter behavior that is only activated when the 'number' POST/GET parameter is explicitly provided. Details When an attacker submits coupon codes against the session-based cart (without passing a…
When was CVE-2026-55795 disclosed?
CVE-2026-55795 was first published in the National Vulnerability Database on June 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
How do I remediate CVE-2026-55795?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55795, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-55795

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