CVE-2025-58451 json
Cattown Vulnerable to Inefficient Regular Expression Complexity and Uncontrolled Resource Consumption
published last yr. modified 4mo ago also GHSA-455v-w7r9-3vv9 , EUVD-2025-27175
- cvss
- 8.7
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 27%
- public exploits
- 0
- none known
Summary
Cattown is a JavaScript markdown parser. Versions prior to 1.0.2 used regular expressions with inefficient, potentially exponential worst-case complexity. This could cause excessive CPU usage due to excessive backtracking on crafted inputs. In turn, the excessive CPU usage could lead to resource exhaustion, where processing malicious inputs could cause high CPU or memory usage, potentially leading to denial of service. Version 1.0.2 contains a patch. Additionally, users should review and restrict input sources if untrusted inputs are processed.
Patch / fix
- npm cattown 1.0.2
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | cattown | <1.0.2 |
1.0.2 |
Affected products
- IEatUranium238 Cattown
Classification
References
-
github.com
/IEatUranium238/Cattown/commit/70c2a28fb7dc520cfb7e401e0e141bff3dd26ead
web
-
github.com
/IEatUranium238/Cattown/security/advisories/GHSA-455v-w7r9-3vv9
web
-
nvd.nist.gov
/vuln/detail/CVE-2025-58451
advisory
-
github.com
/IEatUranium238/Cattown
package
-
github.com
/IEatUranium238/Cattown/releases/tag/security
web
-
npmjs.com
/package/cattown
web
Sources
- CVE List CVE-2025-58451
- GitHub Advisory GHSA-455v-w7r9-3vv9
- NVD CVE-2025-58451
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