Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-76763— Io.smallrye/smallrye-graphql: smallrye graphql: unauthenticated denial of service via large exponent float literals

Quick assessment

Affected
Red Hat Red Hat build of Quarkus
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.

SmallRye GraphQL 中发现了一个缺陷。BigInteger 的标量类型强制转换未能正确验证浮点数或字符串输入的数值大小。未经身份验证的远程攻击者可以通过发送包含大指数浮点数字面量的 GraphQL 查询来利用此缺陷，从而导致分配极大容量的 BigInteger 对象，造成 CPU 资源耗尽或触发 OutOfMemoryError（内存溢出错误），最终导致服务不可用（拒绝服务）。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1499.001 · OS Exhaustion Flood

Affected Version Matrix 1

VendorProduct Version RangeStatus
Red Hat Red Hat build of Quarkus any affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-76763

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Io.smallrye/smallrye-graphql: smallrye graphql: unauthenticated denial of service via large exponent float literals
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in SmallRye GraphQL. The number scalar coercion for BigInteger does not properly validate the magnitude of float or string inputs. An unauthenticated remote attacker can exploit this by sending a GraphQL query containing a large exponent float literal. This can lead to the allocation of extremely large BigInteger objects, causing CPU exhaustion or an OutOfMemoryError, resulting in a denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1284
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat build of Quarkus - cpe:/a:redhat:quarkus:3

II. Public POCs for CVE-2026-76763

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-76763

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-76763 (1)

Other References for CVE-2026-76763 (1)

Same Patch Batch · Red Hat · 2026-08-31 · 6 CVEs total

CVE-2026-83596 8.8 HIGH Webkitgtk: validate the full featurelist array once in opentypeverticaldata findfeature
CVE-2026-12894 8.8 HIGH Quarkus-qute: io.quarkus.qute.reflectionvalueresolver: quarkus:server-side template inject
CVE-2026-13732 7.8 HIGH Gdb: gdb: out-of-bounds write in stabs parser read_member_functions() via crafted elf
CVE-2026-17615 7.5 HIGH Resteasy-core: resteasy sourceprovider remote unauthenticated file read
CVE-2026-81624 7.5 HIGH Undertow-core: undertow: websocketcontainer defaults for buffers and timeouts are infinite

IV. Related Vulnerabilities

Same vendor: Red Hat
Same weakness: CWE-1284

V. Comments for CVE-2026-76763

No comments yet

Leave a comment