CVE-2026-24479

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 7.9%, top 6% 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
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Metasploit, public exploit)
CISA-KEV: Not listedEPSS PROB: 8%CVSS: 9.8Exploit: Metasploit · public exploitExposed: 0

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

HUSTOF is an open source online judge based on PHP/C++/MySQL/Linux for ACM/ICPC and NOIP training. Prior to version 26.01.24, the problem_import_qduoj.php and problem_import_hoj.php modules fail to properly sanitize filenames within uploaded ZIP archives. Attackers can craft a malicious ZIP file containing files with path traversal sequences (e.g., ../../shell.php). When extracted by the server, this allows writing files to arbitrary locations in the web root, leading to Remote Code Execution (RCE). Version 26.01.24 contains a fix for the issue.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
85(Track)
EG Risk 85/100SSVC: 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
Severity98% × 45%
Exploitation65% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
8%
EPSS %ILE
95%
KEV
Not listed

Published

January 27, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Sep 21, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Arbitrary File Write (Zip Slip) in Problem Import Modules leads to RCE (题目导入模块存在 Zip Slip 任意文件写入漏洞导致 RCE) · Advisory · zhblue/hustoj · GitHub

https://github.com/zhblue/hustoj/security/advisories/GHSA-xmgg-2rw4-7fxj
github_commit Patch Available

commit 902bd09e6d00 (zhblue/hustoj)

Patch available: zhblue/hustoj 26.01.24 (contains commit 902bd09e6d00)

https://github.com/zhblue/hustoj/commit/902bd09e6d0011fe89cd84d4236899314b33101f

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 24× 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 149 total refreshes for this CVE.

  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-19 17:00 UTCOSV refresh
  3. 2026-09-18 19:27 UTCEPSS rescore
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  1. 2026-08-21 23:49 UTCEPSS rescore
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  24. 2026-08-02 22:06 UTCEG score recompute
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  27. 2026-07-31 11:42 UTCOSV refresh
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  54. 2026-07-13 19:07 UTCOSV refresh
  55. 2026-07-12 05:46 UTCEPSS rescore
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Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-52539
    First seen Apr 30, 2026

    HUSTOJ Zip-Slip v26.01.24 - RCE

    Open source ↗
  • Metasploitexploit/linux/http/hustoj_problem_import_rce✓ verified
    First seen Jan 26, 2026

    HUSTOJ Admin users can zip-slip problem_import_qduoj.php, planting PHP files in webroot for RCE

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-24479?
CVE-2026-24479 is a critical vulnerability published on January 27, 2026. HUSTOF is an open source online judge based on PHP/C++/MySQL/Linux for ACM/ICPC and NOIP training. Prior to version 26.01.24, the problemimportqduoj.php and problemimporthoj.php modules fail to properly sanitize filenames within uploaded ZIP archives. Attackers can craft a malicious ZIP file…
When was CVE-2026-24479 disclosed?
CVE-2026-24479 was first published in the National Vulnerability Database on January 27, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-24479 actively exploited?
CVE-2026-24479 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8% probability of exploitation in the next 30 days, which ranks it in the top 5.4% of all scored CVEs.
What is the CVSS score of CVE-2026-24479?
CVE-2026-24479 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-24479?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-24479, 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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