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Fencer Vulns
medium 6.9

CVE-2026-101902 json

Axios: Prototype-Pollution Gadget in the Default Instance Allows Inherited Object.prototype.method to Override HTTP Method

published 2026-09-28 41 d ago modified 2026-09-30 39 d ago also EUVD-2026-88371 , GHSA-9fr6-4gfg-395g

cvss
6.9
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

Axios is a promise-based HTTP client for the browser and Node.js. From 0.27.2 until 0.34.0 and 1.20.0, Axios default-instance requests that omit an explicit method can read an inherited method value from Object.prototype. If another vulnerability in the same process pollutes Object.prototype.method, calls such as axios.request({ url }) and axios({ url }) can send a state-changing HTTP method instead of the expected default GET. Axios does not create the prototype pollution source. This is a read-side gadget in axios request dispatch. This issue is fixed in version 0.34.0 and 1.20.0.

Patch / fix

  • npm axios 0.34.0, 1.20.0
  • axios axios 0.34.0, 1.20.0
  • node-axios Debian 14 1.20.0-1

debian advisories DEBIAN-CVE-2026-101902

  • grafana12.4 hummingbird 1 12.4.12-0.3.hum1
  • grafana13.2 hummingbird 1 13.2.1-0.9.hum1
  • grafana13.1 hummingbird 1 13.1.6-0.6.hum1

red hat advisories RHSA-2026:74871RHSA-2026:74872RHSA-2026:74869

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-101902 updated cvss 5.9

axios: axios: Unintended HTTP method override via prototype pollution gadget

  • Red Hat Hardened Images grafana13.1 13.1.6-0.6.hum1, grafana13.2 13.2.1-0.9.hum1, grafana12.4 12.4.12-0.3.hum1
    fixed: vendor fix RHSA-2026:74871
  • Red Hat Hardened Images jaeger 2.20.0-0.11.hum1
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
41 d ago

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/axios/axios/security/advisories/GHSA-9fr6-4gfg-395g referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
npm axios
>=0.27.2, <0.34.0
>=1.0.0, <1.20.0
0.34.0
1.20.0

Affected products

  • axios axios

Classification

Weakness
  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.