CVE-2026-55795

MEDIUMPre-NVD 6.96.9
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: secondary
Trending — 3 sources updated this week
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.9Exploit: None knownExposed: 0

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

Craft Commerce is an ecommerce platform for Craft CMS. From 4.0.0 until 4.11.2 and 5.6.5, CartController in src/controllers/CartController.php activates its RateLimiter only when the number POST or GET parameter is supplied. An unauthenticated attacker can submit couponCode values to actionUpdateCart for the session-based cart while omitting number, preventing creation of the IP rate-limit identity and allowing unlimited automated coupon-code guessing and enumeration. This issue is fixed in versions 4.11.2 and 5.6.5.

CVSS v3
6.9
EG Score
6.9(low)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity69% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

June 19, 2026

Last Modified

September 14, 2026

Advisory Details (5)

Auto-updated Sep 14, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github.
github_release Patch Available

5.6.5

Patch available: craftcms/commerce 5.6.5

https://github.com/craftcms/commerce/releases/tag/5.6.5
github_release Patch Available

4.11.2

Patch available: craftcms/commerce 4.11.2

https://github.com/craftcms/commerce/releases/tag/4.11.2
github_commit Patch Available

commit df22c4f9c4ea (craftcms/commerce)

Patch available: craftcms/commerce 5.6.5 (contains commit df22c4f9c4ea)

https://github.com/craftcms/commerce/commit/df22c4f9c4ea7fb7857d833f755e49ea6f9f5bb5
github_commit Patch Available

commit a7d365cc33dc (craftcms/commerce)

Patch available: craftcms/commerce 4.11.2 (contains commit a7d365cc33dc)

https://github.com/craftcms/commerce/commit/a7d365cc33dc4c60c543defb3458bcdb5749bc13
github Patch Available🟡 PoC Available

Coupon Code Brute-Force via Rate Limit Bypass · Advisory · craftcms/commerce · GitHub

https://github.com/craftcms/commerce/security/advisories/GHSA-h5gm-x9wr-vhcm

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—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 9× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-17 19:31 UTCEPSS rescore
  3. 2026-09-16 14:08 UTCEPSS rescore
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-14 20:27 UTCEG score recompute
  6. 2026-09-14 20:16 UTCEG score recompute
  7. 2026-09-14 16:27 UTCEG score recompute
  8. 2026-09-14 16:05 UTCEG score recompute▲ 6.90
  9. 2026-09-14 16:04 UTCMITRE cvelistV5CVSS v3 → 6.9 · CVSS v4 → 6.9
  10. 2026-08-01 05:01 UTCEG score recompute
  11. 2026-07-26 16:47 UTCEG score recompute
  12. 2026-07-23 03:20 UTCEG score recompute
  13. 2026-06-19 21:23 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-55795?
CVE-2026-55795 is a medium vulnerability published on June 19, 2026. Craft Commerce is an ecommerce platform for Craft CMS. From 4.0.0 until 4.11.2 and 5.6.5, CartController in src/controllers/CartController.php activates its RateLimiter only when the number POST or GET parameter is supplied. An unauthenticated attacker can submit couponCode values to…
When was CVE-2026-55795 disclosed?
CVE-2026-55795 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55795 actively exploited?
CVE-2026-55795 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 77.6% of all scored CVEs.
What is the CVSS score of CVE-2026-55795?
CVE-2026-55795 has a CVSS v3 base score of 6.9 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
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

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