SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-44532

The string format was subject to an injection vulnerability when name constraints were used within a certificate chain, allowing the bypass of these name constraints.Versions of Node.js with the fix for this escape SANs containing the problematic…

MEDIUM 5.3EPSS 10.4%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 10.4%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.

Description

Node.js < 12.22.9, < 14.18.3, < 16.13.2, and < 17.3.1 converts SANs (Subject Alternative Names) to a string format. It uses this string to check peer certificates against hostnames when validating connections. The string format was subject to an injection vulnerability when name constraints were used within a certificate chain, allowing the bypass of these name constraints.Versions of Node.js with the fix for this escape SANs containing the problematic characters in order to prevent the injection. This behavior can be reverted through the --security-revert command-line option.

CVSS 3.1
5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS
10.36% probability · 96th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-296, CWE-295
Affected
nodejs/node.js · oracle/graalvm · oracle/mysql cluster · oracle/mysql connectors · oracle/mysql enterprise monitor · oracle/mysql server · oracle/mysql workbench · oracle/peoplesoft enterprise peopletools · debian/debian linux
Source
support@hackerone.com
EPSS trend
0%8%15%3 November 2026: 10.36%3 November 20263 November 2026

EPSS 10.4% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.