Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/266533?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/266533?format=api", "vulnerability_id": "VCID-ey97-9yys-7bha", "summary": "Impact\n\nCloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support.\n\nAn unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating a congestion-controlled data transfer towards itself. Then, it could manipulate the victim's congestion control state by sending ACK frames covering a large range of packet numbers (including packet numbers that had never been sent); see RFC 9000 Section 19.3. The victim could grow the congestion window beyond typical expectations and allow more bytes in flight than the path might really support. In extreme cases, the window might grow beyond the limit of the internal variable's type, leading to an overflow panic.\n\n\n\nPatches\n\n\nquiche 0.24.4 is the earliest version containing the fix for this issue.", "aliases": [ { "alias": "CVE-2025-4821" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/963119?format=api", "purl": "pkg:apk/alpine/dnsdist@1.9.11-r0?arch=riscv64&distroversion=v3.22&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@1.9.11-r0%3Farch=riscv64&distroversion=v3.22&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/963121?format=api", "purl": "pkg:apk/alpine/dnsdist@1.9.11-r0?arch=x86&distroversion=v3.22&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@1.9.11-r0%3Farch=x86&distroversion=v3.22&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/963122?format=api", "purl": "pkg:apk/alpine/dnsdist@1.9.11-r0?arch=x86_64&distroversion=v3.22&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@1.9.11-r0%3Farch=x86_64&distroversion=v3.22&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/963116?format=api", "purl": "pkg:apk/alpine/dnsdist@1.9.11-r0?arch=armv7&distroversion=v3.22&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@1.9.11-r0%3Farch=armv7&distroversion=v3.22&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/963120?format=api", "purl": "pkg:apk/alpine/dnsdist@1.9.11-r0?arch=s390x&distroversion=v3.22&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@1.9.11-r0%3Farch=s390x&distroversion=v3.22&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/963117?format=api", "purl": "pkg:apk/alpine/dnsdist@1.9.11-r0?arch=loongarch64&distroversion=v3.22&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@1.9.11-r0%3Farch=loongarch64&distroversion=v3.22&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/963114?format=api", "purl": "pkg:apk/alpine/dnsdist@1.9.11-r0?arch=aarch64&distroversion=v3.22&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@1.9.11-r0%3Farch=aarch64&distroversion=v3.22&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/963115?format=api", "purl": "pkg:apk/alpine/dnsdist@1.9.11-r0?arch=armhf&distroversion=v3.22&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@1.9.11-r0%3Farch=armhf&distroversion=v3.22&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/963118?format=api", "purl": "pkg:apk/alpine/dnsdist@1.9.11-r0?arch=ppc64le&distroversion=v3.22&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@1.9.11-r0%3Farch=ppc64le&distroversion=v3.22&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/403605?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=armhf&distroversion=edge&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=armhf&distroversion=edge&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/403608?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=ppc64le&distroversion=edge&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=ppc64le&distroversion=edge&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/403611?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=x86&distroversion=edge&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=x86&distroversion=edge&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/403612?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=x86_64&distroversion=edge&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=x86_64&distroversion=edge&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/415840?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=aarch64&distroversion=v3.23&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=aarch64&distroversion=v3.23&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/415841?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=armhf&distroversion=v3.23&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=armhf&distroversion=v3.23&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/415847?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=x86&distroversion=v3.23&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=x86&distroversion=v3.23&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/403604?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=aarch64&distroversion=edge&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=aarch64&distroversion=edge&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/415848?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=x86_64&distroversion=v3.23&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=x86_64&distroversion=v3.23&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/415845?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=riscv64&distroversion=v3.23&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=riscv64&distroversion=v3.23&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/403606?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=armv7&distroversion=edge&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=armv7&distroversion=edge&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/403607?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=loongarch64&distroversion=edge&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=loongarch64&distroversion=edge&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/415842?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=armv7&distroversion=v3.23&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=armv7&distroversion=v3.23&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/415844?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=ppc64le&distroversion=v3.23&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=ppc64le&distroversion=v3.23&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/415846?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=s390x&distroversion=v3.23&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=s390x&distroversion=v3.23&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/415843?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=loongarch64&distroversion=v3.23&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=loongarch64&distroversion=v3.23&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/403609?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=riscv64&distroversion=edge&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=riscv64&distroversion=edge&reponame=community" }, { "url": "http://public2.vulnerablecode.io/api/packages/403610?format=api", "purl": "pkg:apk/alpine/dnsdist@2.0.1-r0?arch=s390x&distroversion=edge&reponame=community", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/dnsdist@2.0.1-r0%3Farch=s390x&distroversion=edge&reponame=community" } ], "affected_packages": [], "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2025-4821", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00324", "scoring_system": "epss", "scoring_elements": "0.55441", "published_at": "2026-04-02T12:55:00Z" }, { "value": "0.00324", "scoring_system": "epss", "scoring_elements": "0.55465", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.00324", "scoring_system": "epss", "scoring_elements": "0.55444", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.00324", "scoring_system": "epss", "scoring_elements": "0.55495", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.00324", "scoring_system": "epss", "scoring_elements": "0.55505", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.00324", "scoring_system": "epss", "scoring_elements": "0.55484", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.00324", "scoring_system": "epss", "scoring_elements": "0.55467", "published_at": "2026-04-13T12:55:00Z" }, { "value": "0.00833", "scoring_system": "epss", "scoring_elements": "0.74677", "published_at": "2026-04-29T12:55:00Z" }, { "value": "0.00833", "scoring_system": "epss", "scoring_elements": "0.74681", "published_at": "2026-05-05T12:55:00Z" }, { "value": "0.00833", "scoring_system": "epss", "scoring_elements": "0.74635", "published_at": "2026-04-16T12:55:00Z" }, { "value": "0.00833", "scoring_system": "epss", "scoring_elements": "0.74669", "published_at": "2026-04-24T12:55:00Z" }, { "value": "0.00833", "scoring_system": "epss", "scoring_elements": "0.74675", "published_at": "2026-04-26T12:55:00Z" }, { "value": "0.00833", "scoring_system": "epss", "scoring_elements": "0.74642", "published_at": "2026-04-18T12:55:00Z" }, { "value": "0.00833", "scoring_system": "epss", "scoring_elements": "0.74634", "published_at": "2026-04-21T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2025-4821" }, { "reference_url": "https://github.com/cloudflare/quiche/security/advisories/GHSA-6m38-4r9r-5c4m", "reference_id": "GHSA-6m38-4r9r-5c4m", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-06-18T18:29:42Z/" } ], "url": "https://github.com/cloudflare/quiche/security/advisories/GHSA-6m38-4r9r-5c4m" } ], "weaknesses": [ { "cwe_id": 770, "name": "Allocation of Resources Without Limits or Throttling", "description": "The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor." } ], "exploits": [], "severity_range_score": "7.5 - 7.5", "exploitability": null, "weighted_severity": null, "risk_score": null, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-ey97-9yys-7bha" }