CVE-2021-3807
Inefficient Regular Expression Complexity in chalk/ansi-regex
HIGH
7.5
CVSS Score
Published: September 17, 2021 at 12:00 AM UTC
Updated: October 8, 2026 at 10:17 PM UTC
3 products affected across 3 vendorsCommunications Cloud Native Core PolicyAnsi RegexAnsi Regex
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Severity
HIGH7.5
Exploit prediction
EPSS 4%
SSVC
No known exploit
Description
ansi-regex is vulnerable to Inefficient Regular Expression Complexity
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Affected range stops below 4.1.1, so it looks safe — our inference, not a vendor statement
v < 5.0.1v < 6.0.1
Vendor states this is fixed in 5.0.1 (unaffected)
Affected range stops below 6.0.1, 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 (4)
PatchThird Party Advisory
Source: [email protected]
https://github.com/chalk/ansi-regex/commit/8d1d7cdb586269882c4bdc1b7325d0c58c8f76f9ExploitIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://huntr.dev/bounties/5b3cf33b-ede0-4398-9974-800876dfd994Third Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20221014-0002/x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://www.oracle.com/security-alerts/cpuapr2022.htmlSSVC — Action Prioritization
SSVCNo known exploitAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-1333
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