جزئیات آسیب‌پذیری
CVE-2026-47774
Envoy vulnerable to HTTP/2 memory exhaustion via cookie header size bypass and HPACK amplification
شرح رسمی (انگلیسی)
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a vulnerability in Envoy's HTTP/2 downstream request processing allows an unauthenticated remote client to trigger excessive memory consumption, potentially resulting in OOM termination of the Envoy process and denial of service. The issue arises from the combination of two behaviors. First, cookie header bytes are not fully accounted for during request header size validation in Envoy. Second, HPACK header block limits in oghttp2/quiche are enforced on encoded bytes without a corresponding limit on total decoded header size. Together, these behaviors allow a malicious client to cause large decoded header allocations while bypassing the intended request header size protections. Versions 1.35.11, 1.36.7, 1.37.3, and 1.38.1 contain a fix. No complete workaround is known short of applying a fix. Possible temporary mitigations include disabling downstream HTTP/2 where operationally feasible; enforcing stricter request header and cookie limits before traffic reaches Envoy; and monitoring Envoy memory usage for abnormal growth under HTTP/2 traffic.
امتیازهای CVSS
| امتیاز | نسخه | منبع | بردار |
|---|---|---|---|
| 7.5بالا | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 7.5بالا | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
محصولات آسیب‌پذیر
| فروشنده | محصول | نسخه‌ها | منبع |
|---|---|---|---|
| envoyproxy | envoy | < 1.35.11 | CVEProject cvelistV5 (CNA) |
| envoyproxy | envoy | >= 1.36.0, < 1.36.7 | CVEProject cvelistV5 (CNA) |
| envoyproxy | envoy | >= 1.37.0, < 1.37.3 | CVEProject cvelistV5 (CNA) |
| envoyproxy | envoy | >= 1.38.0, < 1.38.1 | CVEProject cvelistV5 (CNA) |
منابع و راهنماها
۱۰- https://github.com/envoyproxy/envoy/security/advisories/GHSA-22m2-hvr2-xqc8 x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2026/06/04/15
- https://access.redhat.com/security/cve/CVE-2026-47774 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2487465 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47774.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:27114 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26210 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26222 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26231 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26247 vendor-advisoryx_refsource_REDHAT
اطلاعات
- تاریخ انتشار
- ۱۴۰۵/۰۳/۲۷
- آخرین به‌روزرسانی
- ۱۴۰۵/۰۶/۰۲
- وضعیت
- منتشرشده
- صادرکننده (CNA)
- GitHub_M
پیش‌بینی بهره‌برداری (EPSS)
ارزیابی SSVC (CISA)
- قابل خودکارسازی
- بله
- وضعیت بهره‌برداری
- ندارد
- اثر فنی
- جزئی
ضعف‌ها (CWE)
- CWE-405Asymmetric Resource Consumption (Amplification)
- CWE-770Allocation of Resources Without Limits or Throttling
- CWE-409Improper Handling of Highly Compressed Data (Data Amplification)