Cyber Resilience

CVE-2025-68475

HighPublic PoC

Published: 22 December 2025

Published
22 December 2025
Modified
17 March 2026
KEV Added
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Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0044 63.6th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-68475 is a high-severity Inefficient Regular Expression Complexity (CWE-1333) vulnerability in Fedify Fedify. Its CVSS base score is 7.5 (High).

Operationally, ranked in the top 36.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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…

more

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.

CWE(s)
CWE-1333

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

fedify
fedify
≤ 1.6.13 · 1.7.0 — 1.7.14 · 1.8.1 — 1.8.15

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References