CVE-2026-74241— Quay: ldap referral filter injection in quay external ldap authentication
Quick assessment
Affected
Red Hat Red Hat OpenShift Update Service
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.
Red Hat Quay是美国Red Hat公司的一个容器镜像仓库管理组件。 Red Hat Quay存在输入验证错误漏洞，该漏洞源于外部LDAP认证处理中未正确转义用户名输入，可能导致攻击者注入LDAP过滤器元字符，进行用户存在性oracle攻击，并可能影响多域Active Directory环境中用于密码绑定的DN。
Affected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat OpenShift Update Service | any |
affected |
| Red Hat | Red Hat Quay 3 | any |
affected |
any |
affected |
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I. Basic Information for CVE-2026-74241
Vulnerability Information
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Vulnerability Title
Quay: ldap referral filter injection in quay external ldap authentication
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Red Hat Quay's external Lightweight Directory Access Protocol (LDAP) authentication handling. When an LDAP referral is returned during authentication, the system does not properly escape the username input. This allows an attacker to inject LDAP filter metacharacters, enabling user-existence oracle attacks at the referral Directory Name (DN). This could also potentially influence which DN is used for password binding in multi-domain Active Directory environments.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
LDAP查询中使用的特殊元素转义处理不恰当(LDAP注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Quay 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat Quay是美国Red Hat公司的一个容器镜像仓库管理组件。 Red Hat Quay存在输入验证错误漏洞，该漏洞源于外部LDAP认证处理中未正确转义用户名输入，可能导致攻击者注入LDAP过滤器元字符，进行用户存在性oracle攻击，并可能影响多域Active Directory环境中用于密码绑定的DN。
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 |
|---|---|---|---|---|
| Red Hat | Red Hat OpenShift Update Service | - |
cpe:/a:redhat:openshift_update_service:5
|
|
| Red Hat | Red Hat Quay 3 | - |
cpe:/a:redhat:quay:3
|
|
| Red Hat | Red Hat Quay 3 | - |
cpe:/a:redhat:quay:3
|
|
II. Public POCs for CVE-2026-74241
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-74241 (2)
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-
🔗 2516141 – (CVE-2026-74241) CVE-2026-74241 quay: LDAP referral filter injection in Quay external LDAP authentication Read full article issue-tracking x_refsource_REDHAT
Same Patch Batch · Red Hat · 2026-08-14 · 11 CVEs total
| CVE-2026-58224 | 6.5 MEDIUM | Samba: ctdb fails to do integrity checking of received packets |
| CVE-2026-74243 | 6.5 MEDIUM | Quay: unauthenticated secscan notification endpoint in quay when psk is unset |
| CVE-2026-74244 | 5.9 MEDIUM | Quay: stripe webhook accepts forged events without signature verification in quay |
| CVE-2026-74245 | 5.9 MEDIUM | Quay: unauthenticated exported logs download in quay |
| CVE-2026-19617 | 5.5 MEDIUM | Libdm: lvm2: libdm: denial of service via uncontrolled recursion in config parser |
| CVE-2026-74240 | 5.4 MEDIUM | Quay: jwt claim validation bypasses in quay federated robot and sso authentication |
| CVE-2026-19879 | 5.3 MEDIUM | Io.undertow/undertow: undertow: http response header integrity issue due to character trun |
| CVE-2026-74242 | 5.3 MEDIUM | Quay: repository notification uuid idor in quay api |
| CVE-2026-13002 | 4.4 MEDIUM | Dnsmasq: infinite loop dos in dnssec nsec/nsec3 type bitmap parsing |
| CVE-2026-74247 | 4.2 MEDIUM | Quay: ssrf via build archive_url in quay build api |
IV. Related Vulnerabilities
Same product: Red Hat OpenShift Update Service
-
CVE-2026-74247
Quay: ssrf via build archive_url in quay build api -
CVE-2026-74245
Quay: unauthenticated exported logs download in quay -
CVE-2026-74244
Quay: stripe webhook accepts forged events without signature -
CVE-2026-74243
Quay: unauthenticated secscan notification endpoint in quay -
CVE-2026-74242
Quay: repository notification uuid idor in quay api
Same vendor: Red Hat
-
CVE-2026-104988
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CVE-2026-95512
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CVE-2026-86345
389-ds-base: 389-ds-base: starttls plaintext-buffer retentio -
CVE-2026-86344
389-ds-base: 389-ds-base: unauthenticated worker-thread-pool -
CVE-2026-103884
Keycloak-services: keycloak-services: path traversal in x.50
Same weakness: CWE-90
-
CVE-2026-94053
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CVE-2026-49469
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CVE-2026-67223
RabbitMQ: LDAP DN injection via unescaped substitution
V. Comments for CVE-2026-74241
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