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CVE-2021-23368

Regular Expression Denial of Service (ReDoS)

MEDIUM
5.3
CVSS Score
Published: April 12, 2021 at 01:50 PM UTC
Updated: June 17, 2026 at 03:38 AM UTC
1 product affected across 1 vendorPostcss

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Severity
MEDIUM5.3
Exploit prediction
EPSS 4%

Description

The package postcss from 7.0.0 and before 8.2.10 are vulnerable to Regular Expression Denial of Service (ReDoS) during source map parsing.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Postcss· Postcssnpm
95%
v ≥ 7.0.0v < 8.2.107.0.0 ≤ v < 7.0.368.0.0 ≤ v < 8.2.107.0.0
Affected range stops below 7.0.36, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.2.10, so it looks safe — our inference, not a vendor statement

References (10)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/postcss/postcss/commit/8682b1e4e328432ba692bed52326e84439cec9e4
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/postcss/postcss/commit/b6f3e4d5a8d7504d553267f80384373af3a3dec5
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r00158f5d770d75d0655c5eef1bdbc6150531606c8f8bcb778f0627be%40%3Cdev.myfaces.apache.org%3E
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r16e295b4f02d81b79981237d602cb0b9e59709bafaa73ac98be7cef1%40%3Cdev.myfaces.apache.org%3E
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r49afb49b38748897211b1f89c3a64dc27f9049474322b05715695aab%40%3Cdev.myfaces.apache.org%3E
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r5acd89f3827ad9a9cad6d24ed93e377f7114867cd98cfba616c6e013%40%3Ccommits.myfaces.apache.org%3E
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r8def971a66cf3e375178fbee752e1b04a812a047cc478ad292007e33%40%3Cdev.myfaces.apache.org%3E
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/rad5af2044afb51668b1008b389ac815a28ecea9eb75ae2cab5a00ebb%40%3Ccommits.myfaces.apache.org%3E

CVSS

5.3MEDIUMsnyk
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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