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CVE-2026-23940— Denial of Service via Oversized Package Upload

Quick assessment

Affected
hexpm hexpm
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hexpm是Hex开源的一个Web页面和接口。 hexpm存在安全漏洞，该漏洞源于资源消耗不受控制，可能导致发布超大软件包时耗尽内存，从而引发拒绝服务。

CVSS 7.1 · High EPSS 0.44% · P36

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
hexpm hexpm < 2026-03-10 affected
82911daf5f8fb2ab44f298e3ba22b90bc1ae3746< 495f01607d3eae4aed7ad09b2f54f31ec7a7df01 affected
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I. Basic Information for CVE-2026-23940

Vulnerability Information
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Vulnerability Title
Denial of Service via Oversized Package Upload
Source: CVE Program / CVE List V5
Vulnerability Description
Uncontrolled Resource Consumption vulnerability in hexpm hexpm/hexpm allows Excessive Allocation. Publishing an oversized package can cause Hex.pm to run out of memory while extracting the uploaded package tarball. This can terminate the affected application instance and result in a denial of service for package publishing and potentially other package-processing functionality. This issue affects hex.pm: before 2026-03-10.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Hexpm 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hexpm是Hex开源的一个Web页面和接口。 hexpm存在安全漏洞，该漏洞源于资源消耗不受控制，可能导致发布超大软件包时耗尽内存，从而引发拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hexpm hexpm 0 ~ 2026-03-10 cpe:2.3:a:hexpm:hexpm:*:*:*:*:*:*:*:*
hexpm hexpm 82911daf5f8fb2ab44f298e3ba22b90bc1ae3746 ~ 495f01607d3eae4aed7ad09b2f54f31ec7a7df01 cpe:2.3:a:hexpm:hexpm:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-23940

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7090 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-23940

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Patches & Fixes for CVE-2026-23940 (1)

Vendor Advisories for CVE-2026-23940 (1)

IV. Related Vulnerabilities

Same product: hexpm
Same vendor: hexpm
Same weakness: CWE-400

V. Comments for CVE-2026-23940

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