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CVE-2026-75939— Openshift/oc-mirror: release signature verification: openpgp signatureerror checked before signed body is consumed

一分钟漏洞结论

影响对象
Red Hat Red Hat OpenShift Container Platform 4
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

A flaw was found in openshift/oc-mirror. The tool incorrectly verifies PGP (Pretty Good Privacy) release image signatures by checking for signature errors before the entire signed body is processed, leading to a bypass of the signature verification. A remote a

CVSS 7.4 · High EPSS 0.21% · P11

影响版本矩阵 2

厂商产品 版本范围状态
Red Hat Red Hat OpenShift Container Platform 4 全部 unaffected
全部 affected
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一、 漏洞 CVE-2026-75939 基础信息

漏洞信息

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Vulnerability Title
Openshift/oc-mirror: release signature verification: openpgp signatureerror checked before signed body is consumed
来源: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in openshift/oc-mirror. The tool incorrectly verifies PGP (Pretty Good Privacy) release image signatures by checking for signature errors before the entire signed body is processed, leading to a bypass of the signature verification. A remote attacker, by intercepting or manipulating network traffic to the signature endpoint, could exploit this to craft a PGP message with a valid Red Hat release key ID but a forged signature. This enables the `oc-mirror` tool to accept and mirror a malicious release payload into a disconnected registry, potentially compromising the integrity of software deployments.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

二、漏洞 CVE-2026-75939 的公开POC

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三、漏洞 CVE-2026-75939 的情报信息

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CVE-2026-75939 厂商安全公告 (2)

同批安全公告 · Red Hat · 2026-09-21 · 共 13 条

CVE-2026-92574 8.8 HIGH Cri-o 检查点恢复绕过安全上下文
CVE-2026-80110 8.1 HIGH Pki-core: dogtag pki v2 rest acl filter's reverse-lexicographic tie-break lets a ca agent
CVE-2026-94184 8.1 HIGH Fetchmail: fetchmail: stack-based buffer overflow in ntlm authentication (fetchmail-sa-202
CVE-2026-15801 8.0 HIGH cri-o容器检查点恢复验证不足漏洞
CVE-2026-94449 7.5 HIGH Quarkus-smallrye-fault-tolerance: quarkus-smallrye-fault-tolerance: memory leak in @applyg
CVE-2026-94368 7.1 HIGH Noobaa-core: noobaa-core: presigned put url escalation to copyobject via unsigned x-amz-co
CVE-2026-94215 5.5 MEDIUM Keycloak 跨域客户端读写越权漏洞
CVE-2026-93433 5.5 MEDIUM Libstoragemgmt: libstoragemgmt: denial of service via stack buffer overflow in scsi vpd pa
CVE-2026-94213 4.9 MEDIUM Keycloak身份服务策略端点用户身份泄露
CVE-2026-92382 4.1 MEDIUM Usbredir: usbredir: unbounded iso_packet_desc[] index in usbredirhost_iso_packet() leads t
CVE-2026-94217 3.5 LOW Keycloak-services UMA资源名冲突权限绕过漏洞
CVE-2026-94218 3.1 LOW Keycloak 2FA设置强制绕过漏洞

IV. Related Vulnerabilities

Same product: Red Hat OpenShift Container Platform 4
Same vendor: Red Hat
Same weakness: CWE-347

V. Comments for CVE-2026-75939

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