CVE-2016-3630

HIGHNVD 8.88.8—

8.8

The binary delta decoder in Mercurial before 3.7.3 allows remote attackers to execute arbitrary code via a (1) clone, (2) push, or (3) pull command, related to (a) a list sizing rounding error and (b) short records.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 90.0%
KEV: Not listed

Published

April 13, 2016

Last Modified

May 6, 2026

Advisory Details (2)

Auto-updated May 9, 2026

No patch confirmed yet.

generic

Mercurial: Multiple vulnerabilities (GLSA 201612-19) — Gentoo security

https://security.gentoo.org/glsa/201612-19

generic

[SECURITY] [DSA 3542-1] mercurial security update

http://www.debian.org/security/2016/dsa-3542

Affected Packages

(1 across 1 ecosystem)

PyPI(1)

Package	Vulnerable range	Fixed in	Dependents
mercurial	0.8.1 ... 3.7.2 (102 versions)	3.7.3	—

Data Freshness Timeline

(refreshed 11× in last 7d / 16× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:43 UTCepss_batch
2026-05-23 00:10 UTCEG score recompute
2026-05-22 20:49 UTCEG score recompute
2026-05-21 22:40 UTCepss_batch
2026-05-20 22:37 UTCepss_batch
2026-05-20 22:37 UTCepss_batch
2026-05-20 22:37 UTCepss_batch
2026-05-20 11:21 UTCepss_batch
2026-05-20 11:21 UTCepss_batch
2026-05-20 11:21 UTCepss_batch
2026-05-18 21:30 UTCepss_batch
2026-05-18 21:30 UTCepss_batch

Frequently asked(5)

What is CVE-2016-3630?

CVE-2016-3630 is a high vulnerability published on April 13, 2016. The binary delta decoder in Mercurial before 3.7.3 allows remote attackers to execute arbitrary code via a (1) clone, (2) push, or (3) pull command, related to (a) a list sizing rounding error and (b) short records.

When was CVE-2016-3630 disclosed?

CVE-2016-3630 was first published in the National Vulnerability Database on April 13, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2016-3630 actively exploited?

CVE-2016-3630 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2016-3630?

CVE-2016-3630 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2016-3630?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-3630, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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