HOMEVULNERABILITIESCVE-2026-3187
CRITICALPOC

CVE-2026-3187

CWE-284Published: February 25, 2026· Updated: Feb 26, 2026

9.8
CVSS v3.1
EPSS:0.06%probability of exploitation in 30 daysPercentile:17.4th

Official Description

A vulnerability was identified in feiyuchuixue sz-boot-parent up to 1.3.2-beta. Affected by this issue is some unknown functionality of the file /api/admin/sys-file/upload of the component API Endpoint. Such manipulation leads to unrestricted upload. The attack may be launched remotely. The exploit is publicly available and might be used. Upgrading to version 1.3.3-beta can resolve this issue. The name of the patch is aefaabfd7527188bfba3c8c9eee17c316d094802. Upgrading the affected component is recommended. The project was informed beforehand and acted very professional: "We have introduced a whitelist restriction on the /api/admin/sys-file/upload endpoint via the oss.allowedExts and oss.allowedMimeTypes configuration options, allowing the specification of permitted file extensions and MIME types for uploads."

NVD Source

Technical Analysis

CVE-2026-3187 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

A proof-of-concept (PoC) exploit exists for CVE-2026-3187. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

szadmin1 product
sz-boot-parent
Source: NVD CPE · 15 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/feiyuchuixue/sz-boot-parent/commit/aefaabfd7527188bfba3c8c9eee17c316d094802
ADVISORYhttps://github.com/yuccun/CVE/blob/main/sz-boot-parent-Arbitrary_File_Upload.md
ADVISORYhttps://vuldb.com/?id.347745
ADVISORYhttps://vuldb.com/?submit.754038

All References (7)

→
https://github.com/feiyuchuixue/sz-boot-parent/Product
→
https://github.com/feiyuchuixue/sz-boot-parent/commit/aefaabfd7527188bfba3c8c9eee17c316d094802Patch
→
https://github.com/feiyuchuixue/sz-boot-parent/releases/tag/v1.3.3-betaRelease Notes
→
https://github.com/yuccun/CVE/blob/main/sz-boot-parent-Arbitrary_File_Upload.mdExploit · Third Party Advisory
→
https://vuldb.com/?ctiid.347745Permissions Required · VDB Entry
→
https://vuldb.com/?id.347745Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.754038Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2026-3187
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-284
CISA KEVNo
ExploitPOC
EPSS (30d)0.06%
Affected1 vendor
PublishedFeb 25, 2026

Related CVEs (CWE-284)

CVE-2026-48908
KEV10.0
CVE-2026-46695
10.0
CVE-2026-35307
10.0
CVE-2026-32737
10.0
CVE-2026-48907
KEV10.0
CVE-2026-35308
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-3187 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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