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No exploitation reportedFix available

CVE-2021-40330

No exploitation reported by the sources we read.

  • Published2021-08-31

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

git_connect_git in connect.c in Git before 2.30.1 allows a repository path to contain a newline character, which may result in unexpected cross-protocol requests, as demonstrated by the git://localhost:1234/%0d%0a%0d%0aGET%20/%20HTTP/1.1 substring.

Timeline

dates in UTC
  1. 2021-08-3104:15CVE publishedNVD

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
Git-scm git
BranchAffectedFixed in
2.30< 2.30.12.30.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • gitUbuntu:Pro:16.04:LTSall versions · fixed in 1:2.7.4-0ubuntu1.10+esm1
  • gitUbuntu:20.04:LTSall versions · fixed in 1:2.25.1-1ubuntu3.2
  • gitUbuntu:18.04:LTSall versions · fixed in 1:2.17.1-1ubuntu0.9
  • gitTuxCare:Ubuntu:16.04all versions · fixed in 1:2.7.4-0ubuntu1.10+tuxcare.els1and 15 other packages
  • gitTuxCare:OracleLinux:6all versions · fixed in 1.7.1-10.el6_10.tuxcare.els1and 11 other packages
  • gitTuxCare:CentOS:8.5all versions · fixed in 2.27.0-1.el8.tuxcare.els1and 14 other packages
  • gitTuxCare:CentOS:8.4all versions · fixed in 2.27.0-1.el8.tuxcare.els1and 14 other packages
  • gitTuxCare:CentOS:7all versions · fixed in 1.8.3.1-25.el7_9.tuxcare.els1and 17 other packages

17 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-40330 Red Hat Product Security37 known affected

    git: unexpected cross-protocol requests via a repository path containing a newline character

    emacs-git as a component of Red Hat Enterprise Linux 7 · emacs-git-el as a component of Red Hat Enterprise Linux 7 · git as a component of Red Hat Enterprise Linux 7 · +34 more

Full record on NVD

Fix

  1. No fix planned, says the vendor Red Hat Product Security CVE-2021-40330 · 19 productsOut of support scope
  2. No fix planned, says the vendor Red Hat Product Security CVE-2021-40330 · 18 productsWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2021-08-31
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-8r9w-64qj-m6cj

Frequently asked questions

What is CVE-2021-40330?

git_connect_git in connect.c in Git before 2.30.1 allows a repository path to contain a newline character, which may result in unexpected cross-protocol requests, as demonstrated by the git://localhost:1234/%0d%0a%0d%0aGET%20/%20HTTP/1.1 substring.

Is CVE-2021-40330 actively exploited?

Active exploitation of CVE-2021-40330 has not been confirmed. Its EPSS score was 2.9% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-40330?

CVE-2021-40330 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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