CVE-2026-44489

MEDIUMNVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.3% (21st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated
5.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Axios is a promise based HTTP client for the browser and Node.js. From 1.15.2 to before 1.16.0, nested objects created by utils.merge() (e.g., config.proxy) are still constructed as plain {} with Object.prototype in their chain. The setProxy() function at lib/adapters/http.js:209-223 reads proxy.username, proxy.password, and proxy.auth without hasOwnProperty checks. When Object.prototype.username is polluted, setProxy() constructs a Proxy-Authorization header with attacker-controlled credentials and injects it into every proxied HTTP request. This vulnerability is fixed in 1.16.0.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

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)
Severity53% × 45%
Impact severity (EG Severity): CVSS 5.3 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.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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.
EPSS PROB
0.3%
EPSS %ILE
21st
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 (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.

EG Severity
5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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 or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

May 29, 2026

Last Modified

June 15, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Proxy-Authorization Header Injection via Prototype Pollution — Incomplete Null-Prototype Fix · Advisory · axios/axios · GitHub

https://github.com/axios/axios/security/advisories/GHSA-654m-c8p4-x5fp

Vendor Advisories for CVE-2026-44489(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 2 ecosystems)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
node-axios1.11.0+dfsg-1 ... 1.8.4+dfsg-1 (8 versions)
  • every version up to 1.16.0-1: fixed in 1.16.0-1
—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
axios1.15.2
  • 1.15.2 up to 1.16.0: fixed in 1.16.0
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 29× 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.

Showing the most recent 99 of 148 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 49 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  2. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  3. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  4. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  5. 2026-10-18 03:39 UTCEG score recompute
  6. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  7. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  8. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  9. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  10. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  11. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  12. 2026-10-12 16:01 UTCEG score recompute
  13. 2026-10-11 19:47 UTCEG score recompute
  14. 2026-10-11 17:01 UTCEG score recompute
  15. 2026-10-11 14:27 UTCEG score recompute
  16. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  17. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  18. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  19. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  20. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  22. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  23. 2026-10-03 14:48 UTCOSV refresh
  24. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 20th percentile
Show 74 more
  1. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  4. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  6. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  8. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-09-14 06:25 UTCEG score recompute
  11. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  12. 2026-09-13 01:06 UTCOSV refresh
  13. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  15. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  19. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  20. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  21. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  23. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  25. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  26. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  27. 2026-08-25 04:20 UTCEG score recompute
  28. 2026-08-23 14:13 UTCEG score recompute
  29. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  30. 2026-08-21 15:10 UTCEG score recompute
  31. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  32. 2026-08-20 10:26 UTCEG score recompute
  33. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  34. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  35. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  36. 2026-08-17 06:53 UTCEG score recompute
  37. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  38. 2026-08-16 02:25 UTCEG score recompute
  39. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  40. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  41. 2026-08-14 00:29 UTCEG score recompute
  42. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  43. 2026-08-12 20:55 UTCEG score recompute
  44. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  45. 2026-08-11 22:25 UTCEG score recompute
  46. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  47. 2026-08-09 16:39 UTCEG score recompute
  48. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  49. 2026-08-08 18:09 UTCEG score recompute
  50. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  51. 2026-08-07 18:44 UTCEG score recompute
  52. 2026-08-06 20:12 UTCEG score recompute
  53. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  54. 2026-08-05 21:42 UTCEG score recompute
  55. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  56. 2026-08-04 23:12 UTCEG score recompute
  57. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  58. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  59. 2026-08-03 15:57 UTCEG score recompute
  60. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  61. 2026-08-02 12:32 UTCEG score recompute
  62. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  63. 2026-08-01 14:01 UTCEG score recompute
  64. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  65. 2026-07-31 05:53 UTCEG score recompute
  66. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  67. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  68. 2026-07-29 11:57 UTCEG score recompute
  69. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  70. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  71. 2026-07-27 09:08 UTCEG score recompute
  72. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  73. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  74. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-44489?
CVE-2026-44489 is a medium-severity vulnerability; its CVE record was published on May 29, 2026. Axios is a promise based HTTP client for the browser and Node.js. From 1.15.2 to before 1.16.0, nested objects created by utils.merge() (e.g., config.proxy) are still constructed as plain {} with Object.prototype in their chain. The setProxy() function at lib/adapters/http.js:209-223 reads…
When was the CVE record for CVE-2026-44489 published?
The CVE record for CVE-2026-44489 was published on May 29, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 15, 2026; the record at its source may have been updated since.
Is CVE-2026-44489 actively exploited?
CVE-2026-44489 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44489?
CVE-2026-44489 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-44489?
A fix for CVE-2026-44489 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-44489 are linked in the Vendor Advisories panel on this page.

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