Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-3912

23
FAUCET Score

CVE-2021-3912 describes a denial-of-service vulnerability in OctoRPKI, affecting Cloudflare and Debian versions of the software. An attacker can craft a malicious GZIP bomb within a repository, causing OctoRPKI to attempt to load and decompress the entire file into memory, leading to an out-of-memory crash. This vulnerability has a CVSS score of 6.5 (Medium), indicating a network-based attack with low complexity and high availability impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.3.0CPE matchmatch criteria
cpe:2.3:a:cloudflare:octorpki:*:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
< 1.4.0CPE match
cpe:2.3:a:cloudflare:octorpki:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.2MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
0.5
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.82%
Probability of exploitation in next 30 days
EPSS Percentile
53.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0082 is in the 62nd percentile among its peer group of 26,236 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa
Product: github.com/cloudflare/cfrpkiFixed in: 1.4.0

Vendor Advisories (1)

goGHSA-g9wh-3vrx-r7hgmedium

OctoRPKI crashes when processing GZIP bomb returned via malicious repository

Nov 10, 2021

References

github.com / cloudflare/cfrpki/security/advisories/GHSA-g9wh-3vrx-r7hg
Third Party Advisory
debian.org / security/2022/dsa-5041
Third Party Advisory