---
schema_version: '1.0'
id: security-20260705-5feff9
url: https://osv.dev/vulnerability/CURL-CVE-2026-5773
url_hash: 5feff9f343f4bca2786bf85d6daa6db59c23c01a7d970c73f30b4bc2fa66abaf
canonical_url: https://osv.dev/vulnerability/CURL-CVE-2026-5773
source: osv:osv
category: security/library
category_raw: cve/library
region: null
tags:
- cve
- CVE-2026-5773
- CURL-CVE-2026-5773
- severity:Low
- https://github.com/curl/curl
- GIT
lang: en
published_at: '2026-04-29T08:00:00Z'
fetched_at: '2026-07-05T15:34:34Z'
updated_at: '2026-07-05T15:37:46Z'
status: published
content_hash: 9f0e830e28a88b50fe2673db0078b20ea0da3e49dda8d17f48c0d085548bfddb
license_note: full
summary: wrong reuse of SMB connection
summary_source: rss
summary_en: wrong reuse of SMB connection
entities:
- name: GitHub
  type: organization
key_facts: []
related: []
related_auto:
- name: Anonymous
  type: organization
  weight: 1.0
- name: AirPods
  type: artifact
  weight: 1.0
- name: Claude Code
  type: artifact
  weight: 1.0
- name: セッション漏洩
  type: event
  weight: 1.0
- name: local-llm
  type: content
  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 / CURL-CVE-2026-5773 / severity:Low / https://github.com/curl/curl / GIT

## Details
**Severity:** Low
**Advisory:** CURL-CVE-2026-5773 (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.

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

## Source
元記事: [CVE-2026-5773: wrong reuse of SMB connection](https://osv.dev/vulnerability/CURL-CVE-2026-5773) — published 2026-04-29T08:00:00Z