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-2020-15904

26
FAUCET Score

CVE-2020-15904 describes a buffer overflow vulnerability in bsdiff4 versions prior to 1.2.0, specifically within its patching routine, allowing an attacker to write beyond allocated heap memory using a specially crafted patch file. This vulnerability carries a high CVSS score of 7.8, indicating a significant risk with high impacts on confidentiality, integrity, and availability, requiring user interaction and local access for exploitation. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.0CPE matchmatch criteria
cpe:2.3:a:pypi:bsdiff4:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.05%
Probability of exploitation in next 30 days
EPSS Percentile
60.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0105 is in the 58th percentile among its peer group of 11,616 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: bsdiff4Fixed in: 1.2.0

Vendor Advisories (1)

pipGHSA-f8m3-jpxr-hm5xhigh

bsdiff4 out-of-bounds write via patch file

May 24, 2022

References

github.com / ilanschnell/bsdiff4/blob/master/CHANGELOG.txt
Release NotesThird Party Advisory
github.com / ilanschnell/bsdiff4/commit/49a4cee2feef7deaf9d89e5e793a8824930284d7
PatchThird Party Advisory