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TI-2026-71819 Aliases CVE-2026-101899

Axios ignores CIDR NO_PROXY entries and routes traffic through proxy

Priority MEDIUM 64CWE-693Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-693.

Summary

Axios from 1.15.0 before 1.20.0 treats the CIDR form of NO_PROXY entries as a hostname suffix instead of evaluating the network range (CWE-693), so matching requests are sent through a configured proxy. The proxy can observe and modify plaintext HTTP URLs, headers and bodies, and for HTTPS it can observe connection metadata and CONNECT requests. The bypass needs no authentication or user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

Axios is a promise-based HTTP client for the browser and Node.js. From 1.15.0 until 1.20.0, Axios shouldBypassProxy treats the NO_PROXY CIDR form as a textual hostname suffix instead of evaluating the network range. A request targets an address covered by a CIDR entry in NO_PROXY while a proxy is configured. The CIDR bypass rule is not matched, so the request is sent through the configured proxy. For plaintext HTTP, the proxy can observe and modify URLs, headers, and bodies; for HTTPS, it can observe connection metadata and CONNECT requests. This issue is fixed in version 1.20.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00512 43rd percentileScored 2026-11-07
Fix Fixed axios (axios): 1.20.0axios (npm): 1.20.0Red Hat: 3 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
axiosaxios1.15.0 to before 1.20.01.20.0Patch availableCNA
—axios (npm)1.15.0 to before 1.20.01.20.0Patch availableGHSA-44g4-m2mj-wpvx
  • axios Vendoraxios Affected 1.15.0 to before 1.20.0 Fixed in 1.20.0 Patch available CNA
  • axios (npm) Vendor— Affected 1.15.0 to before 1.20.0 Fixed in 1.20.0 Patch available GHSA-44g4-m2mj-wpvx

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:axios:axios:*:*:*:*:*:*:*:*——axios
  • cpe:2.3:a:axios:axios:*:*:*:*:*:*:*:* Versions — — ·axios

Remediation

Upgrade axios to version 1.20.0. Red Hat fixes this in Red Hat Hardened Images through RHSA-2026:76677, RHSA-2026:76448 and RHSA-2026:76430.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

  • Fix · CNA axios (axios) Fixed in 1.20.0
  • Fix · GHSA-44g4-m2mj-wpvx axios (npm) Fixed in 1.20.0 Advisory →

Red Hat 3 advisories

  • RHSA-2026:76677 Released 2026-10-06 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images grafana12.4-12.4.12-0.4.hum1@aarch64, grafana12.4-12.4.12-0.4.hum1@src, grafana12.4-12.4.12-0.4.hum1@x86_64
  • RHSA-2026:76448 Released 2026-10-05 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images grafana13.1-13.1.7-0.1.hum1@aarch64, grafana13.1-13.1.7-0.1.hum1@src, grafana13.1-13.1.7-0.1.hum1@x86_64
  • RHSA-2026:76430 Released 2026-10-05 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images grafana13.2-13.2.3-0.1.hum1@aarch64, grafana13.2-13.2.3-0.1.hum1@src, grafana13.2-13.2.3-0.1.hum1@x86_64

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:76430, RHSA-2026:76448, RHSA-2026:76677

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-101899
  2. 2026-10-14 CISA SSVC decision points changed
  3. 2026-10-15 Fix available: RHSA-2026:76677 · Red Hat
  4. 2026-10-15 Fix available: RHSA-2026:76430 · Red Hat
  5. 2026-10-15 Fix available: RHSA-2026:76448 · Red Hat
  6. 2026-10-16 Fix available: Red Hat Hardened Images · Red Hat
  7. 2026-10-16 CVSS score added · Red Hat

References

Other 5

  • TI-2026-30422 Server-side request forgery in axios CVSS 3.1CRITICAL 10.0
  • TI-2026-65210 Axios: Prototype Pollution Gadget in axios toFormData Options CVSS 4.0HIGH 8.3
  • TI-2026-32427 Server-side request forgery in axios CVSS 3.1HIGH 8.6
  • TI-2026-65207 Axios: ReDoS (O(N²)) in shouldBypassProxy host normalization, reachable via untrusted redirect Location CVSS 4.0HIGH 8.2
  • TI-2026-65202 Axios: Denial of Service via Unhandled 'error' Event in HTTP/2 ClientHttp2Session Initialization CVSS 4.0HIGH 8.2
  • TI-2026-65206 Axios: Node HTTP adapter prototype-pollution gadget allows request socket hijack via inherited createConnection CVSS 4.0HIGH 7.6
See all 55 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences