ReDoS in Open Mercato
Priority LOW 31CWE-1333Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-1333.
Summary
Open Mercato does not validate regex rules. An attacker with privileges to create the regex rule can add an unsafe regex to a field. When someone provide the proper string it can result in a DoS attack. This issue was fixed in version 0.6.4.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00483 41st percentileScored 2026-11-07
Fix Fixed Open Mercato (Open Mercato): 0.6.4
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- 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 |
|---|---|---|---|---|---|
| Open Mercato | Open Mercato | before 0.6.4 | 0.6.4 | Patch available | CNA |
- Open Mercato VendorOpen Mercato Affected before 0.6.4 Fixed in 0.6.4 Patch available CNA
Remediation
- Fix · CNA Open Mercato (Open Mercato) Fixed in 0.6.4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-16270
- 2026-10-03 Alias added: GHSA-gchv-qq48-9rjw
References
Sources
- CVE-2026-16270 · CVE Program
- CVE-2026-16270 · NVD
- FIRST EPSS
- GHSA-gchv-qq48-9rjw · GitHub Advisory Database · CC BY 4.0
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