CVE-2018-10887

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A flaw was found in libgit2 before version 0.27.3. It has been discovered that an unexpected sign extension in git_delta_apply function in delta.c file may lead to an integer overflow which in turn leads to an out of bound read, allowing to read before the base object. An attacker may use this flaw to leak memory addresses or cause a Denial of Service.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
80%
KEV
Not listed

Published

July 10, 2018

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Sep 16, 2026
Patch available. Sources: redhat, github_commit, github_release.
github_release Patch Available

libgit2 v0.27.3

Patch available: libgit2/libgit2 v0.27.3

https://github.com/libgit2/libgit2/releases/tag/v0.27.3
github_commit

commit c1577110467b (libgit2/libgit2)

Fix landed in libgit2/libgit2 commit c1577110467b — awaiting tagged release

https://github.com/libgit2/libgit2/commit/c1577110467b701dcbcf9439ac225ea851b47d22
github_commit

commit 3f461902dc10 (libgit2/libgit2)

Fix landed in libgit2/libgit2 commit 3f461902dc10 — awaiting tagged release

https://github.com/libgit2/libgit2/commit/3f461902dc1072acb8b7607ee65d0a0458ffac2a
redhat Patch Available

1598021 – (CVE-2018-10887) CVE-2018-10887 libgit2: integer overflow leads to out-of-bounds read in git_delta_apply, allowing to read before base array

https://bugzilla.redhat.com/show_bug.cgi?id=1598021
generic Patch Available

[SECURITY] [DLA 2936-1] libgit2 security update

https://lists.debian.org/debian-lts-announce/2022/03/msg00031.html
generic Patch Available

[SECURITY] [DLA 1477-1] libgit2 security update

https://lists.debian.org/debian-lts-announce/2018/08/msg00024.html

Affected Packages

(10 across 10 ecosystems)
Alpine:v3.10(1)
PackageVulnerable rangeFixed inDependents
libgit20.23.2-r0 ... 0.27.2-r0 (19 versions)0.27.3-r0—
Alpine:v3.11(1)
PackageVulnerable rangeFixed inDependents
libgit20.23.2-r0 ... 0.27.2-r0 (19 versions)0.27.3-r0—
Alpine:v3.8(1)
PackageVulnerable rangeFixed inDependents
libgit20.23.2-r0 ... 0.27.2-r0 (19 versions)0.27.3-r0—
Alpine:v3.9(1)
PackageVulnerable rangeFixed inDependents
libgit20.23.2-r0 ... 0.27.2-r0 (19 versions)0.27.3-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libgit2—0.27.4+dfsg.1-0.1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libgit2—0.27.4+dfsg.1-0.1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libgit2—0.27.4+dfsg.1-0.1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libgit2—0.27.4+dfsg.1-0.1—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
libgit20.21.1-30.21.1-3+deb8u1—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
libgit20.25.1+really0.24.6-10.25.1+really0.24.6-1+deb9u1—

Weakness Classification(4)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 142 total refreshes for this CVE.

  1. 2026-09-17 19:22 UTCEPSS rescore
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  7. 2026-08-06 16:35 UTCOSV refresh
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  20. 2026-07-23 01:32 UTCEG score recompute
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  24. 2026-07-21 09:17 UTCOSV refresh
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  75. 2026-06-18 17:50 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2018-10887?
CVE-2018-10887 is a high vulnerability published on July 10, 2018. A flaw was found in libgit2 before version 0.27.3. It has been discovered that an unexpected sign extension in gitdeltaapply function in delta.c file may lead to an integer overflow which in turn leads to an out of bound read, allowing to read before the base object. An attacker may use this flaw…
When was CVE-2018-10887 disclosed?
CVE-2018-10887 was first published in the National Vulnerability Database on July 10, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-10887 actively exploited?
CVE-2018-10887 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 19.6% of all scored CVEs.
What is the CVSS score of CVE-2018-10887?
CVE-2018-10887 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2018-10887?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-10887, 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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