CVE-2025-68475

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2, a Regular Expression Denial of Service (ReDoS) vulnerability exists in Fedify's document loader. The HTML parsing regex at packages/fedify/src/runtime/docloader.ts:259 contains nested quantifiers that cause catastrophic backtracking when processing maliciously crafted HTML responses. This issue has been patched in versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/fedify-dev/fedify/commit/2bdcb24d7d6d5886e0214ed504b63a6dc5488779	Patch
https://github.com/fedify-dev/fedify/commit/bf2f0783634efed2663d1b187dc55461ee1f987a	Patch
https://github.com/fedify-dev/fedify/releases/tag/1.6.13	Product Release Notes
https://github.com/fedify-dev/fedify/releases/tag/1.7.14	Product Release Notes
https://github.com/fedify-dev/fedify/releases/tag/1.8.15	Product Release Notes
https://github.com/fedify-dev/fedify/releases/tag/1.9.2	Product Release Notes
https://github.com/fedify-dev/fedify/security/advisories/GHSA-rchf-xwx2-hm93	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:fedify:fedify::::::::
	cpe:2.3:a:fedify:fedify::::::::
	cpe:2.3:a:fedify:fedify::::::::
	cpe:2.3:a:fedify:fedify::::::::

History

No history.

Information

Published : 2025-12-22 22:16

Updated : 2026-03-17 19:39

NVD link : CVE-2025-68475

Mitre link : CVE-2025-68475

CVE.ORG link : CVE-2025-68475

JSON object : View

Products Affected

fedify

fedify

CWE

CWE-1333

Inefficient Regular Expression Complexity

{"id": "CVE-2025-68475", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2025-12-22T22:16:09.143", "references": [{"url": "https://github.com/fedify-dev/fedify/commit/2bdcb24d7d6d5886e0214ed504b63a6dc5488779", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/fedify-dev/fedify/commit/bf2f0783634efed2663d1b187dc55461ee1f987a", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/fedify-dev/fedify/releases/tag/1.6.13", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/fedify-dev/fedify/releases/tag/1.7.14", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/fedify-dev/fedify/releases/tag/1.8.15", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/fedify-dev/fedify/releases/tag/1.9.2", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-rchf-xwx2-hm93", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-1333"}]}], "descriptions": [{"lang": "en", "value": "Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2, a Regular Expression Denial of Service (ReDoS) vulnerability exists in Fedify's document loader. The HTML parsing regex at packages/fedify/src/runtime/docloader.ts:259 contains nested quantifiers that cause catastrophic backtracking when processing maliciously crafted HTML responses. This issue has been patched in versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2."}], "lastModified": "2026-03-17T19:39:32.477", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8F097114-F157-4FE4-9CB8-2BAA384C5B30", "versionEndExcluding": "1.6.13"}, {"criteria": "cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A9267FB8-A2C3-4269-A895-703ACA0C7078", "versionEndExcluding": "1.7.14", "versionStartIncluding": "1.7.0"}, {"criteria": "cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D9EE0DA7-B892-4C34-B4F6-9B413A1A896F", "versionEndExcluding": "1.8.15", "versionStartIncluding": "1.8.1"}, {"criteria": "cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CEFCAFFE-AFCB-468E-8F32-63B8205A39DA", "versionEndExcluding": "1.9.2", "versionStartIncluding": "1.9.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}