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NVD / CVE Program· CNA GitHub_M

CVE-2026-42044: Axios: Invisible JSON Response Tampering via Prototype Pollution Gadget in `parseReviver`

CriticalCVSS 9.1 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 36/100)

  • 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: 0.61% (FIRST EPSS); higher than 50% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: axios axios 1.15.2.
  • Severity is disputed: the assigning authority (CNA) scores it 6.5, NVD 9.1.

Low priority for now. Upgrade to axios axios 1.15.2 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. From 1.0.0 to before 1.15.2, he Axios library is vulnerable to a Prototype Pollution "Gadget" attack that allows any Object.prototype pollution in the application's dependency tree to be escalated into surgical, invisible modification of all JSON API responses — including privilege escalation, balance manipulation, and authorization bypass. The default transformResponse function at lib/defaults/index.js:124 calls JSON.parse(data, this.parseReviver), where this is the merged config object. Because parseReviver is not present in Axios defaults, not validated by assertOptions, and not subject to any constraints, a polluted Object.prototype.parseReviver function is called for every key-value pair in every JSON response, allowing the attacker to selectively modify individual values while leaving the rest of the response intact. This vulnerability is fixed in 1.15.2.

Published
Apr 24, 2026
Updated
Nov 11, 2026
EPSS
0.6% · 50th percentile

Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
36 / 40 · 9.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
9.1
CNA · GitHub_M
6.5
2.6 point gap

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

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.

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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?

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VendorProduct
axiosaxios

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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, < 1.15.2affected

Affected versions

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

  • 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 1.15.21.15.2
Red Hat:ansible_automation_platform_developer:2.5::el8ansible-corebefore 1:2.16.19-1.el8ap1:2.16.19-1.el8ap
Red Hat:ansible_automation_platform_developer:2.5::el8automation-controllerbefore 0:4.6.30-2.el8ap0:4.6.30-2.el8ap
Red Hat:ansible_automation_platform_developer:2.5::el8automation-controller-clibefore 0:4.6.30-2.el8ap0:4.6.30-2.el8ap
Red Hat:ansible_automation_platform_developer:2.5::el8python3.12-urllib3before 0:2.7.0-1.el8ap0:2.7.0-1.el8ap
Red Hat:ansible_automation_platform_developer:2.5::el8receptorbefore 0:1.6.6-1.el8ap0:1.6.6-1.el8ap
Red Hat:ansible_automation_platform_developer:2.5::el8receptorctlbefore 0:1.6.6-1.el8ap0:1.6.6-1.el8ap
Red Hat:ansible_automation_platform_developer:2.5::el9ansible-corebefore 1:2.16.19-1.el9ap1:2.16.19-1.el9ap
Red Hat:ansible_automation_platform_developer:2.5::el9automation-controllerbefore 0:4.6.30-2.el9ap0:4.6.30-2.el9ap
Red Hat:ansible_automation_platform_developer:2.5::el9automation-controller-clibefore 0:4.6.30-2.el9ap0:4.6.30-2.el9ap
Red Hat:ansible_automation_platform_developer:2.5::el9python3.12-urllib3before 0:2.7.0-1.el9ap0:2.7.0-1.el9ap
Red Hat:ansible_automation_platform_developer:2.5::el9receptorbefore 0:1.6.6-1.el9ap0:1.6.6-1.el9ap
Red Hat:ansible_automation_platform_developer:2.5::el9receptorctlbefore 0:1.6.6-1.el9ap0:1.6.6-1.el9ap
Red Hat:ansible_automation_platform:2.5::el8ansible-testbefore 1:2.16.19-1.el8ap1:2.16.19-1.el8ap
Red Hat:ansible_automation_platform:2.5::el8automation-controller-serverbefore 0:4.6.30-2.el8ap0:4.6.30-2.el8ap
Red Hat:ansible_automation_platform:2.5::el8automation-controller-uibefore 0:4.6.30-2.el8ap0:4.6.30-2.el8ap
Red Hat:ansible_automation_platform:2.5::el8automation-controller-venv-towerbefore 0:4.6.30-2.el8ap0:4.6.30-2.el8ap
Red Hat:ansible_automation_platform:2.5::el8automation-eda-controllerbefore 0:1.1.20-1.el8ap0:1.1.20-1.el8ap
Red Hat:ansible_automation_platform:2.5::el8automation-eda-controller-basebefore 0:1.1.20-1.el8ap0:1.1.20-1.el8ap
Red Hat:ansible_automation_platform:2.5::el8automation-eda-controller-base-servicesbefore 0:1.1.20-1.el8ap0:1.1.20-1.el8ap
Red Hat:ansible_automation_platform:2.5::el8automation-eda-controller-event-stream-servicesbefore 0:1.1.20-1.el8ap0:1.1.20-1.el8ap
Red Hat:ansible_automation_platform:2.5::el8automation-eda-controller-worker-servicesbefore 0:1.1.20-1.el8ap0:1.1.20-1.el8ap

+41

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-2026-42041Apr 24, 2026 · Axios: Authentication Bypass via Prototype Pollution Gadget in `validateStatus` Merge Strategy
    26Monitor
  • ← EarlierCVE-2026-42042Apr 24, 2026 · Axios: XSRF Token Cross-Origin Leakage via Prototype Pollution Gadget in `withXSRFToken` Boolean Coercion
    21Monitor
  • Later →CVE-2026-42264May 8, 2026 · Axios: Prototype pollution read-side gadgets in HTTP adapter allow credential injection and request hijacking
    36Monitor

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 axios1.15.2 · descriptionVendor (CNA)
debian:node-axios1.15.2-1 · Debian:14Package registry (OSV)
npm:axios1.15.2Package registry (OSV)
red hat:ansible-core1:2.16.19-1.el8ap · Red Hat:ansible_automation_platform_developer:2.5::el8Package registry (OSV)
red hat:automation-controller0:4.6.30-2.el8ap · Red Hat:ansible_automation_platform_developer:2.5::el8Package registry (OSV)
red hat:automation-controller-cli0:4.6.30-2.el8ap · Red Hat:ansible_automation_platform_developer:2.5::el8Package registry (OSV)
red hat:automation-controller-venv-tower0:4.6.30-2.el8ap · Red Hat:ansible_automation_platform:2.5::el8Package registry (OSV)
red hat:automation-gateway-server0:2.5.20260715-1.el8ap · Red Hat:ansible_automation_platform:2.5::el8Package registry (OSV)
red hat:python3.12-gitpython0:3.1.50-1.el8ap · Red Hat:ansible_automation_platform:2.5::el8Package registry (OSV)
red hat:python3.12-pulpcore0:3.49.63-2.el8ap · Red Hat:ansible_automation_platform:2.5::el8Package registry (OSV)
red hat:python3.12-urllib30:2.7.0-1.el8ap · Red Hat:ansible_automation_platform_developer:2.5::el8Package registry (OSV)
red hat:receptor0:1.6.6-1.el8ap · Red Hat:ansible_automation_platform_developer:2.5::el8Package registry (OSV)
red hat:receptor-debuginfo0:1.6.6-1.el8ap · Red Hat:ansible_automation_platform:2.5::el8Package registry (OSV)
red hat:receptor-debugsource0:1.6.6-1.el8ap · Red Hat:ansible_automation_platform:2.5::el8Package registry (OSV)
red hat:receptorctl0:1.6.6-1.el8ap · Red Hat:ansible_automation_platform_developer:2.5::el8Package 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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · 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.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-915 · Improperly Controlled Modification of Dynamically-Determined Object Attributes

CVSS vector

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

nvd-primary

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records