CVE-2026-48062

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.8%, top 46% 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

CodeIgniter is a PHP full-stack web framework. Prior to 4.7.3, the ext_in upload validation rule in system/Validation/StrictRules/FileRules.php checked the MIME-derived guessed extension instead of the client-provided filename extension. As a result, an uploaded file named shell.php containing GIF-like content could pass validation such as uploaded[avatar]|is_image[avatar]|mime_in[avatar,image/gif]|ext_in[avatar,gif] because the detected MIME type maps to gif, even though the uploaded filename extension is php. Applications are impacted if they accept user-controlled uploads, rely on ext_in to validate the uploaded filename extension, save uploaded files using the original client filename with $file->move($path), store uploads in a web-accessible directory, and allow PHP or other executable files to run from that directory. In those conditions, this may lead to arbitrary code execution. This issue is fixed in version 4.7.3.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
EPSS PROB
0.8%
EPSS %ILE
54th
KEV
Not listed

Published

June 11, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Oct 3, 2026
Patch available. Sources: github_commit, github_release, github.
githubMentions a patch (unverified)

Uploaded file extension validation bypass in `ext_in` rule · Advisory · codeigniter4/CodeIgniter4 · GitHub

https://github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-2gr4-ppc7-7mhx
github_release Patch Available

CodeIgniter 4.7.3

Patch available: codeigniter4/CodeIgniter4 v4.7.3

https://github.com/codeigniter4/CodeIgniter4/releases/tag/v4.7.3
github_commit Patch Available

commit 29299349e7d2 (codeigniter4/CodeIgniter4)

Patch available: codeigniter4/CodeIgniter4 v4.7.3 (contains commit 29299349e7d2)

https://github.com/codeigniter4/CodeIgniter4/commit/29299349e7d232e9532767c7cefaed30957309be

Vendor Advisories for CVE-2026-48062(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 rangeFix by version rangeDependents
codeigniter4/framework4.0.0 ... v4.7.2 (77 versions)
  • every version up to 4.7.3: fixed in 4.7.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 22× 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 102 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
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  3. 2026-10-07 23:48 UTCEPSS rescore
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  1. 2026-09-06 13:47 UTCEPSS rescore
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  74. 2026-06-14 23:18 UTCEPSS rescore
  75. 2026-06-13 23:00 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-48062?
CVE-2026-48062 is a critical vulnerability published on June 11, 2026. CodeIgniter is a PHP full-stack web framework. Prior to 4.7.3, the extin upload validation rule in system/Validation/StrictRules/FileRules.php checked the MIME-derived guessed extension instead of the client-provided filename extension. As a result, an uploaded file named shell.php containing…
When was CVE-2026-48062 disclosed?
CVE-2026-48062 was first published on June 11, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48062 actively exploited?
CVE-2026-48062 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-48062?
CVE-2026-48062 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-48062?
A fix for CVE-2026-48062 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-48062 are linked in the Vendor Advisories panel on this page.

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