CVE-2021-27292
HIGH
7.5
CVSS Score
Published: March 17, 2021 at 12:34 PM UTC
Updated: June 17, 2026 at 03:44 AM UTC
1 product affected across 1 vendorUa Parser Js
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Severity
HIGH7.5
Exploit prediction
EPSS 3%
Description
ua-parser-js >= 0.7.14, fixed in 0.7.24, uses a regular expression which is vulnerable to denial of service. If an attacker sends a malicious User-Agent header, ua-parser-js will get stuck processing it for an extended period of time.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
0.7.14 ≤ v < 0.7.24
Affected range stops below 0.7.24, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://gist.github.com/b-c-ds/6941d80d6b4e694df4bc269493b7be76x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/faisalman/ua-parser-js/commit/809439e20e273ce0d25c1d04e111dcf6011eb566x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-Other
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