CVE-2021-3749: Inefficient Regular Expression Complexity in axios/axios

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-08-31 · updated 2026-06-17
Weakness: CWE-1333

Description

axios is vulnerable to Inefficient Regular Expression Complexity

Affected products

axios: through 0.21.1
Oracle Corporation Oracle GoldenGate: from 21.1 before 21.7.0.0.0 — fixed in 21.7.0.0.0
Siemens SINEC INS: before 1.0; 1.0, 1.0-sp1 — fixed in 1.0
Npm Axios: before 0.21.2 — fixed in 0.21.2

How to fix

Upgrade to a fixed version: Oracle Corporation Oracle GoldenGate 21.7.0.0.0; Siemens SINEC INS 1.0; Npm Axios 0.21.2. Check the vendor advisory for mitigations.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf
https://github.com/axios/axios/commit/5b457116e31db0e88fede6c428e969e87f290929
https://huntr.dev/bounties/1e8f07fc-c384-4ff9-8498-0690de2e8c31
https://lists.apache.org/thread.html/r075d464dce95cd13c03ff9384658edcccd5ab2983b82bfc72b62bb10%40%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/r216f0fd0a3833856d6a6a1fada488cadba45f447d87010024328ccf2%40%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/r3ae6d2654f92c5851bdb73b35e96b0e4e3da39f28ac7a1b15ae3aab8%40%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/r4bf1b32983f50be00f9752214c1b53738b621be1c2b0dbd68c7f2391%40%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/r7324ecc35b8027a51cb6ed629490fcd3b2d7cf01c424746ed5744bf1%40%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/r74d0b359408fff31f87445261f0ee13bdfcac7d66f6b8e846face321%40%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/ra15d63c54dc6474b29f72ae4324bcb03038758545b3ab800845de7a1%40%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/rc263bfc5b53afcb7e849605478d73f5556eb0c00d1f912084e407289%40%3Ccommits.druid.apache.org%3E
https://lists.apache.org/thread.html/rfa094029c959da0f7c8cd7dc9c4e59d21b03457bf0cedf6c93e1bb0a%40%3Cdev.druid.apache.org%3E

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