CVE-2026-49849

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7%, top 50% 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, secondary
Elevated
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: Elevated riskExposed: 0

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

xShop is an open-source shop developed in Laravel. An Unrestricted File Upload vulnerability in xShop version 3.0.3 allows an authenticated administrator to upload executable files (e.g., .php). By uploading a specially crafted php file, an attacker can achieve Remote Code Execution (RCE) on the server, leading to a full system compromise. Version 3.0.4 fixes the issue.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
57(Track*)
EG Risk 57/100SSVC: 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
Severity91% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

August 21, 2026

Last Modified

August 25, 2026

Advisory Details (4)

Auto-updated Aug 29, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available🟡 PoC Available

Unrestricted File Upload in File Attachment Module in Admin panel leads to Arbitrary Code Execution · Advisory · 4xmen/xshop · GitHub

https://github.com/4xmen/xshop/security/advisories/GHSA-fc35-qjg3-f6g7
github_release Patch Available

v3.0.4

Patch available: 4xmen/xshop v3.0.4

https://github.com/4xmen/xshop/releases/tag/v3.0.4
github_pr Patch Available

patch some bugs

Patch available: 4xmen/xshop v3.0.4 (PR #64 merged 2026-02-13)

https://github.com/4xmen/xshop/pull/64
github_commit Patch Available

commit dd4a3add9d6f (4xmen/xshop)

Patch available: 4xmen/xshop v3.0.4 (contains commit dd4a3add9d6f)

https://github.com/4xmen/xshop/commit/dd4a3add9d6f5b5f9dde9685e97f51057903a1db

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 18× 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. 2026-08-29 01:03 UTCEG score recompute
  2. 2026-08-28 21:41 UTCEPSS rescore
  3. 2026-08-27 18:18 UTCEG score recompute
  4. 2026-08-27 14:25 UTCEPSS rescore
  5. 2026-08-26 17:51 UTCEG score recompute
  6. 2026-08-26 14:46 UTCEPSS rescore
  7. 2026-08-25 21:41 UTCEG score recompute
  8. 2026-08-25 17:25 UTCEG score recompute
  9. 2026-08-25 17:01 UTCEG score recompute
  10. 2026-08-25 14:50 UTCEG score recompute
  11. 2026-08-25 13:49 UTCEPSS rescore
  12. 2026-08-24 15:48 UTCEG score recompute
  13. 2026-08-24 11:58 UTCEG score recompute
  14. 2026-08-23 01:24 UTCEG score recompute
  15. 2026-08-23 00:19 UTCEPSS rescore
  16. 2026-08-21 22:25 UTCEG score recompute
  17. 2026-08-21 21:24 UTCEG score recompute
  18. 2026-08-21 21:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-49849?
CVE-2026-49849 is a critical vulnerability published on August 21, 2026. xShop is an open-source shop developed in Laravel. An Unrestricted File Upload vulnerability in xShop version 3.0.3 allows an authenticated administrator to upload executable files (e.g., .php). By uploading a specially crafted php file, an attacker can achieve Remote Code Execution (RCE) on the…
When was CVE-2026-49849 disclosed?
CVE-2026-49849 was first published in the National Vulnerability Database on August 21, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49849 actively exploited?
CVE-2026-49849 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.8% of all scored CVEs.
What is the CVSS score of CVE-2026-49849?
CVE-2026-49849 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-49849?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49849, 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.

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