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CVE-2016-3630

25
FAUCET Score

CVE-2016-3630 describes a critical vulnerability in Mercurial versions prior to 3.7.3, specifically within its binary delta decoder, which allows remote attackers to execute arbitrary code. This high-severity flaw (CVSS 8.8) can be triggered during clone, push, or pull operations due to a list sizing rounding error and short records, potentially leading to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
22CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
23CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
<= 3.7.2CPE matchmatch criteria
cpe:2.3:a:mercurial:mercurial:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.83%
Probability of exploitation in next 30 days
EPSS Percentile
91.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0483 is in the 91st percentile among its peer group of 14,824 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 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 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

pippatch availablevia ghsa
Product: mercurialFixed in: 3.7.3
fedoravendor investigatingvia nvd_reference
View patch
susevendor investigatingvia nvd_reference
View patch

Vendor Advisories (2)

pipGHSA-9vjf-jjcq-3gh7high

Mercurial arbitrary code execution vulnerability

May 14, 2022
redhatCVE-2016-3630Important

mercurial: remote code execution in binary delta decoding

Mar 29, 2016

References

lists.fedoraproject.org / pipermail/package-announce/2016-April/181505.html
Mailing ListVendor Advisory
lists.fedoraproject.org / pipermail/package-announce/2016-April/181542.html
Mailing ListVendor Advisory
lists.opensuse.org / opensuse-security-announce/2016-04/msg00016.html
Mailing ListVendor Advisory
lists.opensuse.org / opensuse-security-announce/2016-04/msg00017.html
Mailing ListVendor Advisory
lists.opensuse.org / opensuse-security-announce/2016-04/msg00018.html
Mailing ListVendor Advisory
lists.opensuse.org / opensuse-security-announce/2016-04/msg00043.html
Mailing ListVendor Advisory
security.gentoo.org / glsa/201612-19
Third Party Advisory
selenic.com / repo/hg-stable/rev/b6ed2505d6cf
Third Party Advisory
selenic.com / repo/hg-stable/rev/b9714d958e89
Third Party Advisory
mercurial-scm.org / wiki/WhatsNew
Vendor Advisory
debian.org / security/2016/dsa-3542
Third Party Advisory
oracle.com / technetwork/topics/security/bulletinapr2016-2952098.html
Third Party Advisory