Uncontrolled recursion in Remarshal-project Remarshal
Priority HIGH 72CWE-674Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-674.
Summary
Remarshal prior to v0.17.1 expands YAML alias nodes unlimitedly, hence Remarshal is vulnerable to Billion Laughs Attack. Processing untrusted YAML files may cause a denial-of-service (DoS) condition.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00962 61st percentileScored 2026-11-07
Fix Fixed Remarshal (Remarshal-project): v0.17.1remarshal (PyPI): 0.17.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Remarshal-project | Remarshal | before v0.17.1 | v0.17.1 | Patch available | CNA |
| — | remarshal (PyPI) | before 0.17.1 | 0.17.1 | Patch available | GHSA-gw7g-qr8w-3448 |
- Remarshal VendorRemarshal-project Affected before v0.17.1 Fixed in v0.17.1 Patch available CNA
- remarshal (PyPI) Vendor— Affected before 0.17.1 Fixed in 0.17.1 Patch available GHSA-gw7g-qr8w-3448
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:remarshal_project:remarshal:*:*:*:*:*:*:*:* | before 0.17.1 | Vulnerable | Remarshal-project |
- cpe:2.3:a:remarshal_project:remarshal:*:*:*:*:*:*:*:* Versions before 0.17.1 Vulnerable ·Remarshal-project
Remediation
- Fix · CNA Remarshal (Remarshal-project) Fixed in v0.17.1
- Fix · GHSA-gw7g-qr8w-3448 remarshal (PyPI) Fixed in 0.17.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-47163
- 2026-10-03 Alias added: GHSA-gw7g-qr8w-3448
References
Patch 1
Sources
- CVE-2023-47163 · CVE Program
- CVE-2023-47163 · NVD
- FIRST EPSS
- GHSA-gw7g-qr8w-3448 · GitHub Advisory Database · CC BY 4.0
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