Axios: Prototype pollution gadget in fetch adapter can alter outbound requests
Published Sep 28, 2026
6.9
MEDIUMCVSS 4.0
EPSS 0.41%
Description
Axios is a promise-based HTTP client for the browser and Node.js. From 1.7.0 until 1.20.0, the fetch adapter constructs a Request with sanitized resolvedOptions but then calls fetch with the original fetchOptions. A separate same-process prototype-pollution flaw populates Object.prototype.headers so fetchOptions.headers resolves through inheritance. The inherited fetchOptions.headers value overrides the sanitized Request headers through the second argument to fetch after Request construction. Attacker-controlled request headers can alter authorization, caching, metadata-service access, or application-specific behavior. This issue is fixed in version 1.20.0.
Affected products
-
- Version >= 1.7.0, < 1.20.0StatusaffectedConstraints-
- Version
No data.
No data.
Red Hat Hardened Images
grafana12.4
Affected
Red Hat Hardened Images
grafana13.1
Affected
Red Hat Hardened Images
grafana13.2
Affected
Red Hat Hardened Images
jaeger
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Hardened Images | grafana12.4 | Affected | n/a |
| Red Hat Hardened Images | grafana13.1 | Affected | n/a |
| Red Hat Hardened Images | grafana13.2 | Affected | n/a |
| Red Hat Hardened Images | jaeger | Not affected | n/a |
axios
npm
Introduced 1.7.0 Fixed 1.20.0
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | axios | 1.7.0 | 1.20.0 |
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/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
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 28, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
Percentile over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
References (9)
- https://access.redhat.com/security/cve/CVE-2026-101908 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2542592 Issue Tracking
- https://github.com/advisories/GHSA-vh66-26gq-q6x8 Advisory
- https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a x_refsource_MISC
- https://github.com/axios/axios/pull/11141 x_refsource_MISC
- https://github.com/axios/axios/releases/tag/v1.20.0 x_refsource_MISC
- https://github.com/axios/axios/security/advisories/GHSA-vh66-26gq-q6x8 exploitx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-101908
- https://www.cve.org/CVERecord?id=CVE-2026-101908
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-101908 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2542592 | Issue Tracking | |
| https://github.com/advisories/GHSA-vh66-26gq-q6x8 | Advisory | |
| https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a | x_refsource_MISC | |
| https://github.com/axios/axios/pull/11141 | x_refsource_MISC | |
| https://github.com/axios/axios/releases/tag/v1.20.0 | x_refsource_MISC | |
| https://github.com/axios/axios/security/advisories/GHSA-vh66-26gq-q6x8 | exploitx_refsource_CONFIRM | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-101908 | ||
| https://www.cve.org/CVERecord?id=CVE-2026-101908 |
Change history (0)
No recorded changes yet.