---
schema_version: '1.0'
id: security-20260708-c317fd
url: https://osv.dev/vulnerability/CVE-2026-5773
url_hash: c317fd82a12736b355e72860076706a8f6fcc7be1afff79b2d1db26d52efe599
canonical_url: https://osv.dev/vulnerability/CVE-2026-5773
source: osv:nvd
category: security/library
category_raw: cve/library
region: null
tags:
- cve
- CVE-2026-5773
- severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- https://github.com/curl/curl
- GIT
lang: en
published_at: '2026-05-13T08:27:42Z'
fetched_at: '2026-07-08T15:37:25Z'
updated_at: '2026-07-08T15:37:33Z'
status: published
content_hash: 7425366bdc14dafdd492de9072c7c0acc823c9f7e684b9ed294c17975554ed68
license_note: full
summary: wrong reuse of SMB connection
summary_source: rss
summary_en: wrong reuse of SMB connection
entities:
- name: CVE-2013-0074
  type: naturalobject
- name: GitHub
  type: organization
- name: XSMB
  type: concept
- name: ConnectionPooler
  type: concept
key_facts: []
related: []
related_auto:
- name: XSHN
  type: concept
  weight: 2.0
- name: SMS
  type: method
  weight: 2.0
- name: Giải độc đắc
  type: concept
  weight: 2.0
- name: agent_openclaw
  type: person
  weight: 1.0
- name: CVSS score
  type: concept
  weight: 1.0
title: 'CVE-2026-5773: wrong reuse of SMB connection'
---

# CVE-2026-5773: wrong reuse of SMB connection

## TL;DR
wrong reuse of SMB connection

## Key Points
- cve / CVE-2026-5773 / severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N / https://github.com/curl/curl / GIT

## Details
**Severity:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
**Advisory:** CVE-2026-5773

**Affected (your watchlist):**
- `GIT:https://github.com/curl/curl` curl-8_9_1 → no fixed version listed [mac]

**Details:**
libcurl might in some circumstances reuse the wrong connection for SMB(S)
transfers.

libcurl features a pool of recent connections so that subsequent requests can
reuse an existing connection to avoid overhead.

When reusing a connection a range of criteria must be met. Due to a logical
error in the code, a network transfer operation that was requested by an
application could wrongfully reuse an existing SMB connection to the same
server that was using a different 'share' than the new subsequent transfer
should.

This could in unlucky situations lead to the download of the wrong file or the
upload of a file to the wrong place. When this happens, the same credentials
are used and the server name is the same.

**References:**
- http://www.openwall.com/lists/oss-security/2026/04/29/9
- https://curl.se/docs/CVE-2026-5773.html
- https://curl.se/docs/CVE-2026-5773.json
- https://hackerone.com/reports/3650689
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5773.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-5773

_Data: OSV.dev (upstream: nvd) — https://osv.dev/vulnerability/CVE-2026-5773_

## Source
元記事: [CVE-2026-5773: wrong reuse of SMB connection](https://osv.dev/vulnerability/CVE-2026-5773) — published 2026-05-13T08:27:42Z