Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-3805— use after free in SMB connection reuse

Quick assessment

Affected
curl curl
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

curl是cURL开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl存在安全漏洞，该漏洞源于重复SMB请求时使用指向已释放内存的数据指针，可能导致内存损坏。

AI Predicted 7.5 Difficulty: Hard EPSS 0.95% · P60

Affected Version Matrix 11

VendorProduct Version RangeStatus
curl curl 8.13.0< 8.14.2 affected
8.15.0< 8.16.1 affected
8.17.0< 8.19.0 affected
f4831daa9b2a97e8a2921d6b62cc4dfdd0d8646e< e090be9f73a7a71459ef678c7cc4b1f75e3ea883 affected
8.18.0 affected
8.17.0 affected
8.16.0 affected
8.15.0 affected
… +3 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-3805

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
use after free in SMB connection reuse
Source: CVE Program / CVE List V5
Vulnerability Description
When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
curl 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
curl是cURL开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl存在安全漏洞，该漏洞源于重复SMB请求时使用指向已释放内存的数据指针，可能导致内存损坏。
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
curl curl 8.13.0 ~ 8.14.2 -
curl curl f4831daa9b2a97e8a2921d6b62cc4dfdd0d8646e ~ e090be9f73a7a71459ef678c7cc4b1f75e3ea883 -
curl curl 8.18.0 -

II. Public POCs for CVE-2026-3805

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-3805

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-3805 (2)

Same Patch Batch · curl · 2026-03-11 · 4 CVEs total

CVE-2026-3784 wrong proxy connection reuse with credentials
CVE-2026-3783 token leak with redirect and netrc
CVE-2026-1965 bad reuse of HTTP Negotiate connection

IV. Related Vulnerabilities

Same product: curl
Same vendor: curl
Same weakness: CWE-416

V. Comments for CVE-2026-3805

No comments yet

Leave a comment