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CVE-2026-118488— Heap exhaustion via unbounded simple string or bulk string allocation in Vert.x Redis client

Quick assessment

Affected
Eclipse Foundation Eclipse Vert.x
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.

在 Eclipse Vert.x 版本 [4.0.0, 4.5.35] 或 [5.0.0, 5.2.2] 中，当恶意服务器持续向以换行符（EOL）终止的线路（非长度前缀格式，例如简单字符串 [1]）发送字节时，缓冲区将无限制增长，最终导致内存溢出（OOM）。我们需要为以换行符终止的线路引入可配置的缓冲区大小限制。 此外，如果恶意服务器发送精心构造的 RESP 响应（例如缺少 CRLF 结尾的块字符串 [2]），解析器将陷入无限循环：它反复解析同一缓冲区，并不断将相同的响应推送给调用方。若调用方仅对响应进行缓冲，这同

CVSS 5.9 · Medium
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I. Basic Information for CVE-2026-118488

Vulnerability Information
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Vulnerability Title
Heap exhaustion via unbounded simple string or bulk string allocation in Vert.x Redis client
Source: CVE Program / CVE List V5
Vulnerability Description
In Eclipse Vert.x versions [4.0.0, 4.5.35] or [5.0.0, 5.2.2], when a malicious server keeps sending bytes on an EOL-terminated line (not length-prefixed, for example a simple string [1]), we'll keep growing the buffer without bounds, eventually leading to an OOM. We need to have a configurable limit for EOL-terminated lines. If a malicious server sends a specially crafted RESP response (for example a bulk string [2] with missing CRLF trailer), the parser enters an infinite loop where it keeps parsing the same buffer and pushing the same response to the caller, which may lead e.g. to an OOM if the consumer just buffers the responses. We must fix the parser to avoid this infinite looping.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eclipse Foundation Eclipse Vert.x 4.0.0 ~ 4.5.35 -

II. Public POCs for CVE-2026-118488

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III. Intelligence Information for CVE-2026-118488

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Other References for CVE-2026-118488 (2)

Same Patch Batch · Eclipse Foundation · 2026-11-03 · 9 CVEs total

CVE-2026-89292 9.2 CRITICAL Unauthenticated SSRF with MNESTIX_BACKEND_API_KEY disclosure in Eclipse Mnestix Browser se
CVE-2026-89293 8.8 HIGH Missing server-side authorization in Eclipse Mnestix Browser admin server actions allows u
CVE-2026-115231 8.5 HIGH User-mode module can post forged callback requests to another module's callback queue, run
CVE-2026-118489 7.5 HIGH CachingWebClient shares user-specific HTTP responses across users via the shared cache tie
CVE-2026-118487 7.5 HIGH Heap exhaustion via unbounded line accumulation in Vert.x STOMP FrameParser
CVE-2026-113421 7.3 HIGH ThreadX Modules invokes trace-full callbacks after module unload
CVE-2026-92610 Improper limitation of paths in py-aspect-model-loader
CVE-2026-89295 Unauthenticated memory-exhaustion denial of service in Eclipse Mnestix AAS Generator unbou

IV. Related Vulnerabilities

Same product: Eclipse Vert.x
Same vendor: Eclipse Foundation