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CVE-2025-55152

21
FAUCET Score

CVE-2025-55152 is a denial-of-service vulnerability affecting oak middleware versions 17.1.5 and below, which is used in Deno, Node.js, Cloudflare Workers, and Bun. Attackers can significantly slow down an oak server by sending specially crafted x-forwarded-proto or x-forwarded-for headers. This vulnerability has a CVSS score of 5.3 (Medium) with low attack complexity and no user interaction required, leading to a low impact on availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
OakserverOak
< 17.1.6CNA affected

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 19th percentile among its peer group of 23,690 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-r3v7-pc4g-7xp9medium

Oak Server has ReDoS in x-forwarded-proto and x-forwarded-for headers

Aug 12, 2025

References

github.com / oakserver/oak/commit/b60e60330ef227707c4dc13ef0ea36192d894f44
github.com / oakserver/oak/security/advisories/GHSA-r3v7-pc4g-7xp9