NVD / CVE Program· CNA VulnCheck

CVE-2026-114098: Dulwich 0.22.5 before 1.2.8 Path Traversal via Stash Pop Symlinks

HighCVSS 7.3 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 29/100)

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: 0.15% (FIRST EPSS).
Someone with local access to the system can trigger it. No account or password is required. No special conditions are required; it is repeatable.
Fixed version: jelmer dulwich 1.2.8.

Low priority for now. Upgrade to jelmer dulwich 1.2.8 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

Dulwich from 0.22.5 before 1.2.8 contains a path traversal vulnerability in stash.py pop() that allows attackers to write arbitrary files outside the worktree through intermediate directory symlinks. Attackers can craft a malicious repository whose popped stash writes a payload into .git/hooks/post-checkout, achieving code execution on the next checkout.

Path traversal

Published: Oct 21, 2026
Updated: Oct 27, 2026
EPSS: 0.1% · 4th percentile
CWE: CWE-22

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 29 / 40 · 7.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · VulnCheck: 7.3; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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.

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Versions reported by the vendor

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

jelmer dulwich
- 1.2.8not affected
- 0.22.5 and later · before 1.2.8affected · semver

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	dulwich	from 0	—
Debian:14	dulwich	before 1.2.8-1	1.2.8-1
PyPI	dulwich	from 0.22.5 · before 1.2.8	1.2.8

Same product

jelmer: all records

Other highest-scoring records for the same primary product.

CVE-2026-42305Dulwich has an arbitrary file write via NTFS-hostile tree entries on Windows
35Monitor
CVE-2026-122299Dulwich before 1.2.20 Commit Parser Tree Header Misinterpretation
34Monitor
CVE-2026-114094Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter paths
34Monitor

Published before and after this one in the same product

← EarlierCVE-2026-114095Oct 21, 2026 · Dulwich before 1.2.9 Infinite Loop DoS via Pack.resolve_object
28Monitor
← EarlierCVE-2026-114096Oct 21, 2026 · Dulwich 0.24.0 before 1.2.8 Symlink Write-Through via porcelain.checkout paths
29Monitor
← EarlierCVE-2026-114097Oct 21, 2026 · Dulwich 0.23.1 before 1.2.8 Symlink Path Traversal via filter_branch Index Filter
29Monitor

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
jelmer dulwich	1.2.8	Vendor (CNA)
debian:dulwich	1.2.8-1 · Debian:14	Package registry (OSV)
PyPI:dulwich	1.2.8	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.

PublishedOct 21, 2026
Fix recordedOct 22, 2026+1 d
TodayNov 13, 2026+24 d

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Credits

All researchers

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

manus-usereporter
jelmerfinder

Variant candidates

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

CVE-2026-42305133 days apartDulwich has an arbitrary file write via NTFS-hostile tree entries on Windows
35Monitor
CVE-2026-1140940 days apartDulwich before 1.2.9 Arbitrary File Write via DOS drive letter paths
34Monitor
CVE-2026-52726133 days apartDulwich's submodule path traversal in porcelain.submodule_update / porcelain.clone(recurse_submodules=True) yields RCE via attacker-dropped .git/hooks payload
30Monitor
CVE-2026-1140970 days apartDulwich 0.23.1 before 1.2.8 Symlink Path Traversal via filter_branch Index Filter
29Monitor
CVE-2026-47712133 days apartDulwich doesn't sanitize commit subjects in `porcelain.format_patch`
13Monitor

Not on record for this CVE: patch commit or PR link · public bounty program.

Technical details

Attack conditions

Someone with local access to the system can trigger it.
No account or password is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Local
Attack complexity: Low
Privileges required: None
User interaction: P
Scope: X

Weakness class (CWE)

CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

The bug in code

The whole CWE-22 class

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

Vulnerable

1const file = path.join(ROOT, req.query.name);
2res.sendFile(file);

Fixed

1const file = path.resolve(ROOT, req.query.name);
2if (!file.startsWith(ROOT + path.sep)) {
3  return res.sendStatus(400);
4}
5res.sendFile(file);

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

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Change log

SSVC exploitation— → noneOct 27, 2026, 11:07 PM UTC
Fix✗ → ✓Oct 22, 2026, 3:36 AM UTC
Exploit maturity— → noneOct 21, 2026, 2:07 AM UTC

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

References

github.com/jelmer/dulwich/security/advisories/GHSA-cm62-gvxx-vmxx

Show all references (1 more)

www.vulncheck.com/advisories/dulwich-0.22.5-before-1.2.8-path-traversal-via-stash-pop-symlinks

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

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