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NVD / CVE Program· CNA GitHub_M

CVE-2026-42035: Axios: Header Injection via Prototype Pollution

HighCVSS 7.4 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 29/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.40% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: axios axios 1.15.1.

Low priority for now. Upgrade to axios axios 1.15.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, a prototype pollution gadget exists in the Axios HTTP adapter (lib/adapters/http.js) that allows an attacker to inject arbitrary HTTP headers into outgoing requests. The vulnerability exploits duck-type checking of the data payload, where if Object.prototype is polluted with getHeaders, append, pipe, on, once, and Symbol.toStringTag, Axios misidentifies any plain object payload as a FormData instance and calls the attacker-controlled getHeaders() function, merging the returned headers into the outgoing request. The vulnerable code resides exclusively in lib/adapters/http.js. The prototype pollution source does not need to originate from Axios itself — any prototype pollution primitive in any dependency in the application's dependency tree is sufficient to trigger this gadget. This vulnerability is fixed in 1.15.1 and 0.31.1.

Published
Apr 24, 2026
Updated
Nov 11, 2026
EPSS
0.4% · 34th percentile

Report tools

JSON

Action score

29

Monitor

Low priority for now.

CVSS
29 / 40 · 7.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
7.4
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-42035

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
axiosaxios

Is the Axios on your site affected?

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • axios axios

    • >= 1.0.0, < 1.15.1, < 0.31.1affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • axios axiosbefore 0.31.1
  • axios axios1.0.0 and later · before 1.15.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12node-axiosfrom 0—
Debian:14node-axiosbefore 1.15.2-11.15.2-1
npmaxiosfrom 1.0.0 · before 1.15.11.15.1
npmaxiosbefore 0.31.10.31.1
Red Hat:ansible_automation_platform_developer:2.6::el9automation-controllerbefore 0:4.7.13-2.el9ap0:4.7.13-2.el9ap
Red Hat:ansible_automation_platform_developer:2.6::el9automation-controller-clibefore 0:4.7.13-2.el9ap0:4.7.13-2.el9ap
Red Hat:ansible_automation_platform_developer:2.6::el9python3.12-urllib3before 0:2.7.0-1.el9ap0:2.7.0-1.el9ap
Red Hat:ansible_automation_platform:2.6::el9automation-controller-serverbefore 0:4.7.13-2.el9ap0:4.7.13-2.el9ap
Red Hat:ansible_automation_platform:2.6::el9automation-controller-uibefore 0:4.7.13-2.el9ap0:4.7.13-2.el9ap
Red Hat:ansible_automation_platform:2.6::el9automation-controller-venv-towerbefore 0:4.7.13-2.el9ap0:4.7.13-2.el9ap
Red Hat:ansible_automation_platform:2.6::el9automation-platform-uibefore 0:2.6.10-1.el9ap0:2.6.10-1.el9ap
Red Hat:ansible_automation_platform:2.6::el9python3.12-pyjwtbefore 0:2.13.0-1.el9ap0:2.13.0-1.el9ap
Red Hat:ansible_automation_platform:2.6::el9python3.12-pyjwt+cryptobefore 0:2.13.0-1.el9ap0:2.13.0-1.el9ap
Red Hat:ansible_automation_platform:2.6::el9python3.12-pysequoiabefore 0:0.1.34-1.el9ap0:0.1.34-1.el9ap
Red Hat:ansible_automation_platform:2.6::el9python3.12-pysequoia-debuginfobefore 0:0.1.34-1.el9ap0:0.1.34-1.el9ap
Red Hat:ansible_automation_platform:2.6::el9python3.12-pysequoia-debugsourcebefore 0:0.1.34-1.el9ap0:0.1.34-1.el9ap

Same product

axios: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-42043Axios: Incomplete Fix for CVE-2025-62718 — NO_PROXY Protection Bypassed via RFC 1122 Loopback Subnet (127.0.0.0/8) in Axios 1.15.0
    40Plan
  • CVE-2024-57965In axios before 1.7.8, lib/helpers/isURLSameOrigin.js does not use a URL object when determining an origin, and has a potentially unwanted…
    39Monitor
  • CVE-2026-44492Axios: shouldBypassProxy does not recognize IPv4-mapped IPv6 addresses, allowing NO_PROXY bypass (incomplete fix for CVE-2025-62718)
    38Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-42033Apr 24, 2026 · Axios: Prototype Pollution Gadgets - Response Tampering, Data Exfiltration, and Request Hijacking
    29Monitor
  • ← EarlierCVE-2026-42034Apr 24, 2026 · Axios: HTTP adapter streamed uploads bypass maxBodyLength when maxRedirects: 0
    21Monitor
  • Later →CVE-2026-42036Apr 24, 2026 · Axios: HTTP adapter streamed responses bypass maxContentLength
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
axios axios1.15.1 · descriptionVendor (CNA)
debian:node-axios1.15.2-1 · Debian:14Package registry (OSV)
npm:axios0.31.1Package registry (OSV)
npm:axios1.15.1Package registry (OSV)
red hat:automation-controller0:4.7.13-2.el9ap · Red Hat:ansible_automation_platform_developer:2.6::el9Package registry (OSV)
red hat:automation-controller-cli0:4.7.13-2.el9ap · Red Hat:ansible_automation_platform_developer:2.6::el9Package registry (OSV)
red hat:automation-controller-server0:4.7.13-2.el9ap · Red Hat:ansible_automation_platform:2.6::el9Package registry (OSV)
red hat:automation-controller-ui0:4.7.13-2.el9ap · Red Hat:ansible_automation_platform:2.6::el9Package registry (OSV)
red hat:automation-controller-venv-tower0:4.7.13-2.el9ap · Red Hat:ansible_automation_platform:2.6::el9Package registry (OSV)
red hat:automation-platform-ui0:2.6.10-1.el9ap · Red Hat:ansible_automation_platform:2.6::el9Package registry (OSV)
red hat:python3.12-pyjwt0:2.13.0-1.el9ap · Red Hat:ansible_automation_platform:2.6::el9Package registry (OSV)
red hat:python3.12-pyjwt+crypto0:2.13.0-1.el9ap · Red Hat:ansible_automation_platform:2.6::el9Package registry (OSV)
red hat:python3.12-pysequoia0:0.1.34-1.el9ap · Red Hat:ansible_automation_platform:2.6::el9Package registry (OSV)
red hat:python3.12-pysequoia-debuginfo0:0.1.34-1.el9ap · Red Hat:ansible_automation_platform:2.6::el9Package registry (OSV)
red hat:python3.12-pysequoia-debugsource0:0.1.34-1.el9ap · Red Hat:ansible_automation_platform:2.6::el9Package registry (OSV)
red hat:python3.12-urllib30:2.7.0-1.el9ap · Red Hat:ansible_automation_platform_developer:2.6::el9Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-4448948 days apartAxios: Proxy-Authorization Header Injection via Prototype Pollution — Incomplete Null-Prototype Fix
    21Monitor
  • CVE-2026-4017514 days apartAxios has Unrestricted Cloud Metadata Exfiltration via Header Injection Chain
    20Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-113 · Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

All records