Axios is a promise-based HTTP client for the browser and Node.js. From 0.28.0 until 0.34.0 and 1.15.1 until 1.20.0, ToFormData processes inherited serialization options and visitor properties supplied through prototype pollution. A separate same-process prototype-pollution flaw supplies inherited dots, indexes, metaTokens, maxDepth, visitor, or Blob values before object serialization. The inherited options alter toFormData field naming and data interpretation, maxDepth can force request failure, Blob changes value handling, and a polluted visitor can execute when an attacker already has the stronger ability to inject a function. Serialized field naming and data interpretation can change, maxDepth can cause request failure, Blob can alter value handling, and a polluted visitor can execute under the stronger function-injection primitive. This issue is fixed in versions 0.34.0 and 1.20.0.
CVE-2026-101909
“—” beside the score: it is equal to the CVSS score beside it.
This high-severity CVE scores 8.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (42nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-88392 (ENISA EUVD) · GHSA-x97p-jq2g-jp4f (GitHub Security Advisories)Source: ENISA EUVD
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
A fix is available — apply it.
- CVSS v3
- 8.3
- EG Score
- 8.3HIGHmedium confidence
- EG Risk
- 68EG Risk 68/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity83% × 45%Impact severity (EG Severity): CVSS 8.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.5%
- EPSS %ILE
- 42nd
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (8.3): severity, escalated by confirmed exploitation. This CVE's 8.3 is its impact severity (EG Severity), not escalated.
- EG Severity
- 8.3 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
- EG Likelihood
- 0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
September 28, 2026
Last Modified
October 1, 2026
Advisory Details (6)
Auto-updated Sep 28, 2026v1.20.0
Patch available: axios/axios v1.20.0
https://github.com/axios/axios/releases/tag/v1.20.0v0.34.0
Patch available: axios/axios v0.34.0
https://github.com/axios/axios/releases/tag/v0.34.0commit d29be181f85f (axios/axios)
Patch available: axios/axios v0.34.0 (contains commit d29be181f85f)
https://github.com/axios/axios/commit/d29be181f85f6fe93397a07b1f69606d9622637bcommit d19040bda7a8 (axios/axios)
Patch available: axios/axios v1.20.0 (contains commit d19040bda7a8)
https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39afix: harden runtime option handling
Patch available: axios/axios v1.20.0 (PR #11141 merged 2026-08-12)
https://github.com/axios/axios/pull/11141Prototype Pollution Gadget in axios toFormData Options · Advisory · axios/axios · GitHub
https://github.com/axios/axios/security/advisories/GHSA-x97p-jq2g-jp4fVendor Advisories for CVE-2026-101909(4)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:74872Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
- RHSA-2026:74871Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
- RHSA-2026:74869Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
- GHSA-x97p-jq2g-jp4fGitHub Security AdvisoriesHigh
Axios: Prototype Pollution Gadget in axios toFormData Options
Patch Availability(5)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | grafana13-1-main-13.1.6-0.6.hum1 | 2026-10-02 | redhat |
| redhat | grafana12-4-main-12.4.12-0.3.hum1 | 2026-10-02 | redhat |
| redhat | grafana13-2-main-13.2.1-0.9.hum1 | 2026-10-02 | redhat |
| npm | axios @ 0.34.0 (fixes >= 0.28.0, < 0.34.0) | — | ghsa |
| npm | axios @ 1.20.0 (fixes >= 1.15.1, < 1.20.0) | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(4 across 4 ecosystems)
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-axios | 1.11.0+dfsg-1 ... 1.8.4+dfsg-1 (22 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-axios | 1.11.0+dfsg-1 ... 1.8.4+dfsg-1 (12 versions) |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-axios | 1.11.0+dfsg-1 ... 1.8.4+dfsg-1 (11 versions) |
| — |
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| axios | — |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 71× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
- 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-11-01 08:00 UTCGHSA enrichmentGHSA-x97p-jq2g-jp4f · GitHub severity HIGH
- 2026-11-01 08:00 UTCEG score recompute
- 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-27 20:00 UTCEG score recompute
- 2026-10-27 20:00 UTCVendor advisory
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-25 14:57 UTCEG score recompute
- 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-20 19:16 UTCEG score recompute
- 2026-10-20 19:16 UTCVendor advisory
- 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-18 05:11 UTCEG score recompute
- 2026-10-17 19:54 UTCEG score recompute
- 2026-10-17 19:54 UTCVendor advisory
Show 61 moreShow fewer
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-12 16:41 UTCEG score recompute
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-12 02:02 UTCVendor advisory
- 2026-10-11 20:16 UTCEG score recompute
- 2026-10-11 18:28 UTCEG score recompute
- 2026-10-11 15:11 UTCVendor advisory
- 2026-10-11 15:02 UTCEG score recompute
- 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-11 04:20 UTCEG score recompute
- 2026-10-11 04:20 UTCVendor advisory
- 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-10 17:28 UTCVendor advisory
- 2026-10-10 06:33 UTCEG score recompute
- 2026-10-10 06:33 UTCVendor advisory
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-09 19:41 UTCVendor advisory
- 2026-10-09 08:49 UTCVendor advisory
- 2026-10-08 21:39 UTCEG score recompute
- 2026-10-08 21:39 UTCVendor advisory
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-08 10:45 UTCEG score recompute
- 2026-10-08 10:45 UTCVendor advisory
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-10-07 23:44 UTCVendor advisory
- 2026-10-07 12:52 UTCVendor advisory
- 2026-10-07 02:00 UTCEG score recompute
- 2026-10-07 02:00 UTCVendor advisory
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 26th percentile
- 2026-10-06 15:02 UTCVendor advisory
- 2026-10-06 04:11 UTCEG score recompute
- 2026-10-06 04:11 UTCVendor advisory
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 26th percentile
- 2026-10-05 17:19 UTCVendor advisory
- 2026-10-05 06:29 UTCEG score recompute
- 2026-10-05 06:29 UTCVendor advisory
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 26th percentile
- 2026-10-04 19:38 UTCVendor advisory
- 2026-10-04 08:47 UTCVendor advisory
- 2026-10-03 21:55 UTCEG score recompute
- 2026-10-03 21:55 UTCVendor advisory
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 26th percentile
- 2026-10-03 10:57 UTCVendor advisory
- 2026-10-03 00:06 UTCEG score recompute
- 2026-10-03 00:06 UTCVendor advisory
- 2026-10-02 02:22 UTCEG score recompute
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 26th percentile
- 2026-10-01 15:23 UTCEG score recompute
- 2026-10-01 14:51 UTCEG score recompute
- 2026-09-30 19:44 UTCEG score recompute
- 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 26th percentile
- 2026-09-29 16:02 UTCEG score recompute
- 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.4% · 26th percentile
- 2026-09-29 05:11 UTCEG score recompute
- 2026-09-28 18:20 UTCEG score recompute
- 2026-09-28 17:47 UTCEG score recomputeFirst assessed: 8.3 HIGH
- 2026-09-28 17:46 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:12:node-axios
Same vendor
10 shownredhat:RHSA-2026:74869
Frequently asked(5)
What is CVE-2026-101909?
When was the CVE record for CVE-2026-101909 published?
Is CVE-2026-101909 actively exploited?
What is the CVSS score of CVE-2026-101909?
How do I remediate CVE-2026-101909?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-101909
Is Your Infrastructure Affected by CVE-2026-101909?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.