CVE-2026-101903: high-severity vulnerability in axios
Axios: ReDoS in fromDataURI data: URL parser freezes the Node event loop (DoS)
Published
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.4%
exploitation probability
0.4%top 70% of all CVEs
observed exploitation
nono source reports it
Axios is a promise-based HTTP client for the browser and Node.js. From 1.16.1 until 1.20.0, the RFC 2397 regular expression allows slash characters on both sides of the media-type separator. An application passes an attacker-controlled malformed data URL containing many slash characters and no comma. the JavaScript regular-expression engine explores many separator placements before rejecting the URL. Synchronous excessive backtracking can block the Node.js event loop and cause denial of service. The affected identifiers are fromDataURI, DATA_URL_PATTERN, data:. This issue is fixed in version 1.20.0.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
axios · axiosRelated CVEs — axios
In the same product, most dangerous first.
CVE-2019-10742—CVE-2019-10742EPSS 6.1%CVE-2026-25639HIGHAxios affected by Denial of Service via __proto__ Key in mergeConfigEPSS 2.0%CVE-2026-40175MEDIUMAxios has Unrestricted Cloud Metadata Exfiltration via Header Injection ChainEPSS 1.3%CVE-2025-62718MEDIUMAxios has a NO_PROXY Hostname Normalization Bypass that Leads to SSRFEPSS 1.2%CVE-2025-58754HIGHAxios is vulnerable to DoS attack through lack of data size checkEPSS 1.1%CVE-2026-44495HIGHAxios: Credential Theft and Response Hijacking via Prototype Pollution Gadget in Config MergeEPSS 1.0%