NVD / CVE Program· CNA GitHub_M

CVE-2025-21614: go-git clients vulnerable to DoS via maliciously crafted Git server replies

HighCVSS 7.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 30/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.71% (FIRST EPSS); higher than 54.2% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: azl3 packer 1.9.5-5 on Azure Linux 3.0 1.9.5-5; azl3 packer 1.9.5-6 on Azure Linux 3.0 1.9.5-5; cbl2 cri-o 1.22.3-13 on CBL Mariner 2.0 1.22.3-13.

Low priority for now. Upgrade to azl3 packer 1.9.5-5 on Azure Linux 3.0 1.9.5-5; azl3 packer 1.9.5-6 on Azure Linux 3.0 1.9.5-5; cbl2 cri-o 1.22.3-13 on CBL Mariner 2.0 1.22.3-13 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

go-git is a highly extensible git implementation library written in pure Go. A denial of service (DoS) vulnerability was discovered in go-git versions prior to v5.13. This vulnerability allows an attacker to perform denial of service attacks by providing specially crafted responses from a Git server which triggers resource exhaustion in go-git clients. Users running versions of go-git from v4 and above are recommended to upgrade to v5.13 in order to mitigate this vulnerability.

Published: Jan 6, 2025
Updated: Jun 17, 2026
EPSS: 0.7% · 54th percentile
CWE: CWE-400

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.7%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 7.5; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
go-git project	go-git	cpe:2.3:a:go-git_project:go-git

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

go-git project go-gitbefore 5.13.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

go-git go-git
- >= 4.0.0, < 5.13.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
AlmaLinux:8	grafana	before 9.2.10-21.el8_10	9.2.10-21.el8_10
AlmaLinux:8	grafana-selinux	before 9.2.10-21.el8_10	9.2.10-21.el8_10
Debian:12	golang-github-go-git-go-git	from 0	—
Debian:13	golang-github-go-git-go-git	before 5.13.2-1	5.13.2-1
Go	github.com/go-git/go-git	from 4.0.0 · up to and including 4.13.1	—
Go	github.com/go-git/go-git/v4	from 4.0.0	—
Go	github.com/go-git/go-git/v5	before 5.13.0	5.13.0
Go	gopkg.in/src-d/go-git.v4	from 4.0.0	—
Go	gopkg.in/src-d/go-git.v4	from 4.0.0 · up to and including 4.13.1	—
openSUSE:Leap 15.6	govulncheck-vulndb	before 0.0.20250108T191942-150000.1.26.1	0.0.20250108T191942-150000.1.26.1
openSUSE:Leap 15.6	trivy	before 0.58.2-bp156.2.6.1	0.58.2-bp156.2.6.1
openSUSE:Leap 16.0	cheat	before 4.4.2-bp160.2.1	4.4.2-bp160.2.1
openSUSE:Tumbleweed	cheat	before 4.4.2-2.1	4.4.2-2.1
openSUSE:Tumbleweed	govulncheck-vulndb	before 0.0.20250108T191942-1.1	0.0.20250108T191942-1.1
openSUSE:Tumbleweed	operator-sdk	before 1.39.0-1.1	1.39.0-1.1
Red Hat:enterprise_linux:8::appstream	grafana	before 0:9.2.10-21.el8_10	0:9.2.10-21.el8_10
Red Hat:enterprise_linux:8::appstream	grafana-debuginfo	before 0:9.2.10-21.el8_10	0:9.2.10-21.el8_10
Red Hat:enterprise_linux:8::appstream	grafana-debugsource	before 0:9.2.10-21.el8_10	0:9.2.10-21.el8_10
Red Hat:enterprise_linux:8::appstream	grafana-selinux	before 0:9.2.10-21.el8_10	0:9.2.10-21.el8_10
Red Hat:rhel_eus:9.4::appstream	grafana	before 0:9.2.10-21.el9_4	0:9.2.10-21.el9_4
Red Hat:rhel_eus:9.4::appstream	grafana-debuginfo	before 0:9.2.10-21.el9_4	0:9.2.10-21.el9_4
Red Hat:rhel_eus:9.4::appstream	grafana-debugsource	before 0:9.2.10-21.el9_4	0:9.2.10-21.el9_4
Red Hat:rhel_eus:9.4::appstream	grafana-selinux	before 0:9.2.10-21.el9_4	0:9.2.10-21.el9_4
Rocky Linux:8	grafana	before 0:9.2.10-21.el8_10	0:9.2.10-21.el8_10

Same product

go-git project: all records

Other highest-scoring records for the same primary product.

CVE-2023-49569Maliciously crafted Git server replies can lead to path traversal and RCE on go-git clients
39Monitor
CVE-2025-21613go-git has an Argument Injection via the URL field
36Monitor
CVE-2023-49568Maliciously crafted Git server replies can cause DoS on go-git clients
30Monitor

Published before and after this one in the same product

Later →CVE-2026-25934Feb 9, 2026 · go-git improperly verifies data integrity values for .idx and .pack files
17Monitor
Later →CVE-2026-34165Mar 31, 2026 · go-git: Maliciously crafted idx file can cause asymmetric memory consumption
20Monitor
Later →CVE-2026-33762Mar 31, 2026 · go-git: Missing validation decoding Index v4 files leads to panic
11Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
azl3 packer 1.9.5-5 on Azure Linux 3.0	1.9.5-5 · CBL-Mariner Releases	Microsoft (MSRC)
azl3 packer 1.9.5-6 on Azure Linux 3.0	1.9.5-5 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 cri-o 1.22.3-13 on CBL Mariner 2.0	1.22.3-13 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 cri-o 1.22.3-14 on CBL Mariner 2.0	1.22.3-13 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 cri-o 1.22.3-14 on CBL-Mariner 2.0	1.22.3-13 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 packer 1.9.5-5 on CBL Mariner 2.0	1.9.5-7 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 packer 1.9.5-5 on CBL-Mariner 2.0	1.9.5-7 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 packer 1.9.5-7 on CBL Mariner 2.0	1.9.5-7 · CBL-Mariner Releases	Microsoft (MSRC)
almalinux:grafana	9.2.10-21.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:grafana-selinux	9.2.10-21.el8_10 · AlmaLinux:8	Package registry (OSV)
debian:golang-github-go-git-go-git	5.13.2-1 · Debian:13	Package registry (OSV)
Go:github.com/go-git/go-git/v5	5.13.0	Package registry (OSV)
opensuse:cheat	4.4.2-2.1 · openSUSE:Tumbleweed	Package registry (OSV)
opensuse:govulncheck-vulndb	0.0.20250108T191942-150000.1.26.1 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:operator-sdk	1.39.0-1.1 · openSUSE:Tumbleweed	Package registry (OSV)
opensuse:trivy	0.58.2-bp156.2.6.1 · openSUSE:Leap 15.6	Package registry (OSV)
red hat:grafana	0:9.2.10-21.el8_10 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:grafana-debuginfo	0:9.2.10-21.el8_10 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:grafana-debugsource	0:9.2.10-21.el8_10 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:grafana-selinux	0:9.2.10-21.el8_10 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
rocky linux:grafana	0:9.2.10-21.el8_10 · Rocky Linux:8	Package registry (OSV)
suse:govulncheck-vulndb	0.0.20250108T191942-150000.1.26.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP6	Package registry (OSV)
suse:trivy	0.58.2-bp156.2.6.1 · SUSE:Package Hub 15 SP6	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

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

nvd-secondary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log

Fix✗ → ✓Sep 28, 2026, 10:44 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/go-git/go-git/security/advisories/GHSA-r9px-m959-cxf4

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records