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-2020-15693

18
FAUCET Score

CVE-2020-15693 describes a CR-LF injection vulnerability in the httpClient standard library of Nim 1.2.4. An attacker can exploit this by controlling parts of a URL provided to httpClient.get or httpClient.post, the User-Agent header, or custom HTTP header names/values. With a CVSS score of 6.5 (MEDIUM), this vulnerability is network-exploitable with low attack complexity, potentially leading to partial confidentiality and integrity impacts. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.2.6CPE matchmatch criteria
cpe:2.3:a:nim-lang:nim:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.05%
Probability of exploitation in next 30 days
EPSS Percentile
79.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0205 is in the 68th percentile among its peer group of 23,725 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

consensys.net / diligence/vulnerabilities/nim-httpclient-header-crlf-injection
ExploitThird Party Advisory
github.com / nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/httpclient.nim
PatchThird Party Advisory
nim-lang.org / blog/2020/07/30/versions-126-and-108-released.html
Release NotesThird Party Advisory
openwall.com / lists/oss-security/2021/02/04/2
ExploitMailing ListThird Party Advisory