---
schema_version: '1.0'
id: security-20260709-c31b3d
url: https://osv.dev/vulnerability/CVE-2026-8927
url_hash: c31b3d3b2eda7b37b812761d5b6f585997e9144b9647410469c2efa07ef7ac74
canonical_url: https://osv.dev/vulnerability/CVE-2026-8927
source: osv:nvd
category: security/library
category_raw: cve/library
region: null
tags:
- cve
- CVE-2026-8927
- severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- https://github.com/curl/curl
- GIT
lang: en
published_at: '2026-07-03T06:16:06Z'
fetched_at: '2026-07-09T15:38:26Z'
updated_at: '2026-07-09T15:38:50Z'
status: published
content_hash: 1cd4dc6e3326dd15f3a379ba68f94dee4dd799a2c08db0aa79365394bc3c2eba
license_note: full
summary: env-set cross-proxy Digest auth state leak
summary_source: rss
summary_en: env-set cross-proxy Digest auth state leak
entities:
- name: CVE-2022-26925
  type: event
- name: GitHub
  type: organization
- name: Developers Digest
  type: organization
- name: AUTHENTIC BRANDS GROUP
  type: organization
- name: State TV channel
  type: organization
key_facts: []
related: []
related_auto:
- name: GitLost
  type: concept
  weight: 4.0
- name: Windowsローカルセキュリティ認証機関(LSA
  type: location
  weight: 1.0
- name: AI Agent
  type: concept
  weight: 1.0
- name: Hy3
  type: artifact
  weight: 1.0
- name: OpenClaw
  type: artifact
  weight: 1.0
title: 'CVE-2026-8927: env-set cross-proxy Digest auth state leak'
---

# CVE-2026-8927: env-set cross-proxy Digest auth state leak

## TL;DR
env-set cross-proxy Digest auth state leak

## Key Points
- cve / CVE-2026-8927 / severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H/A:N
**Advisory:** CVE-2026-8927

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

**Details:**
When reusing a libcurl handle for sequential transfers driven by
environment-variable proxy configuration, libcurl fails to clear the proxy
authentication state between requests. Specifically, if the initial transfer
authenticates against `proxyA` using Digest auth, a subsequent transfer routed
through `proxyB` erroneously leaks the `Proxy-Authorization:` header intended
solely for `proxyA`.

**References:**
- https://curl.se/docs/CVE-2026-8927.html
- https://curl.se/docs/CVE-2026-8927.json
- https://hackerone.com/reports/3744543
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8927.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-8927

_Data: OSV.dev (upstream: nvd) — https://osv.dev/vulnerability/CVE-2026-8927_

## Source
元記事: [CVE-2026-8927: env-set cross-proxy Digest auth state leak](https://osv.dev/vulnerability/CVE-2026-8927) — published 2026-07-03T06:16:06Z