@microsoft/kiota-http-fetchlibrary provides TypeScript libraries for Kiota-generated API clients. In versions 1.0.0-preview.97 through 1.0.0-preview.101, @microsoft/kiota-http-fetchlibrary's RedirectHandler is documented as stripping Authorization and Cookie from cross-origin redirect targets, but the default scrubSensitiveHeaders callback in RedirectHandlerOptions uses case-sensitive property deletion (delete headers.Authorization, delete headers.Cookie) on a headers object that FetchRequestAdapter.getRequestFromRequestInformation has already lower-cased. The delete therefore targets keys that do not exist, the scrub is a no-op, and any Bearer token or Cookie attached by a kiota-generated SDK is forwarded to an attacker-controlled host across a 30x redirect. This is reachable in the default middleware chain (MiddlewareFactory.getDefaultMiddlewares) with no custom configuration, and applies to every kiota-generated TypeScript SDK that uses BaseBearerTokenAuthenticationProvider or any other authentication provider that sets the Authorization request header. Version 1.0.0-preview.102 patches the issue.
CVE-2026-49336
“—” beside the score: it is equal to the CVSS score beside it.
This medium-severity CVE scores 5.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (54th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-38061 (ENISA EUVD) · GHSA-396q-4vc8-28x9 (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
- 5.5
- EG Score
- 5.5MEDIUMmedium confidence
- EG Risk
- 56EG Risk 56/100
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)Severity55% × 45%Impact severity (EG Severity): CVSS 5.5 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 or medium mission impact; Attend at high (mission-essential systems).Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.7%
- EPSS %ILE
- 54th
- 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 (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 5.5 MEDIUMCVSS-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
- 0.7% 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 or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 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 or medium mission impact; Attend at high (mission-essential systems).
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 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)14 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 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
June 19, 2026
Last Modified
October 25, 2026
Advisory Details (2)
Auto-updated Jun 22, 2026Bearer token and Cookie leak across origin on redirect due to case-mismatched scrub in fetchRequestAdapter · Advisory · microsoft/kiota-typescript · GitHub
https://github.com/microsoft/kiota-typescript/security/advisories/GHSA-396q-4vc8-28x9commit 09f8bd9b34d6 (microsoft/kiota-typescript)
Patch available: microsoft/kiota-typescript @microsoft/kiota-abstractions@1.0.0-preview.102 (contains commit 09f8bd9b34d6)
https://github.com/microsoft/kiota-typescript/commit/09f8bd9b34d68bf412a9b78f6ca7e7961ef14974Vendor Advisories for CVE-2026-49336(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(1)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| npm | @microsoft/kiota-http-fetchlibrary @ 1.0.0-preview.102 (fixes >= 1.0.0-preview.97, <= 1.0.0-preview.101) | — | 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
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| @microsoft/kiota-http-fetchlibrary | — |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 39× 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 100 of 157 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. None are among the latest 100 rows. The 57 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-11-01 07:46 UTCGHSA enrichmentGHSA-396q-4vc8-28x9 · GitHub severity MODERATE
- 2026-11-01 07:46 UTCEG score recompute
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-10-29 16:21 UTCEG score recompute
- 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-10-25 23:34 UTCEG score recompute
- 2026-10-25 16:33 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-25 14:22 UTCEG score recompute
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-21 16:33 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-19 16:32 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-18 03:34 UTCEG score recompute
- 2026-10-17 16:34 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-16 16:42 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 1.2% · 67th percentile
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- 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-12 16:00 UTCEG score recompute
- 2026-10-11 19:43 UTCEG score recompute
- 2026-10-11 16:57 UTCEG score recompute
- 2026-10-11 14:21 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-08 17:12 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-02 15:10 UTCOSV refresh
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-09-26 15:59 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-09-26 00:27 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-09-23 17:53 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-09-20 20:16 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-09-13 13:09 UTCEG score recompute
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-09-10 09:35 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-09-08 22:01 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-09-02 14:12 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-09-01 13:54 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-09-01 04:40 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-30 20:47 UTCEG score recompute
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.2% · 64th percentile
- 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.2% · 64th percentile
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-25 13:49 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-24 23:49 UTCEG score recompute
- 2026-08-23 23:45 UTCEG score recompute
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-22 23:45 UTCEG score recompute
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-21 08:08 UTCEG score recompute
- 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-20 08:01 UTCEG score recompute
- 2026-08-19 17:04 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-19 07:04 UTCEG score recompute
- 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-17 13:47 UTCEPSS rescoreEPSS 1.2% · 64th percentile
- 2026-08-16 20:28 UTCEG score recompute
- 2026-08-16 14:56 UTCEPSS rescoreEPSS 1.2% · 64th percentile
- 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.2% · 64th percentile
- 2026-08-15 18:50 UTCEG score recompute
- 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.2% · 64th percentile
- 2026-08-14 18:49 UTCEG score recompute
- 2026-08-13 22:00 UTCEPSS rescoreEPSS 1.2% · 64th percentile
- 2026-08-12 18:45 UTCEG score recompute
- 2026-08-12 13:51 UTCEPSS rescoreEPSS 1.2% · 64th percentile
- 2026-08-11 18:45 UTCEG score recompute
- 2026-08-11 00:00 UTCEPSS rescoreEPSS 1.2% · 64th percentile
- 2026-08-09 17:52 UTCEG score recompute
- 2026-08-09 13:46 UTCEPSS rescoreEPSS 1.2% · 64th percentile
- 2026-08-08 17:52 UTCEG score recompute
- 2026-08-08 16:37 UTCEPSS rescoreEPSS 1.2% · 64th percentile
- 2026-08-07 17:51 UTCEG score recompute
- 2026-08-06 17:51 UTCEG score recompute
- 2026-08-06 13:47 UTCEPSS rescoreEPSS 1.2% · 64th percentile
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-49336?
When was the CVE record for CVE-2026-49336 published?
Is CVE-2026-49336 actively exploited?
What is the CVSS score of CVE-2026-49336?
How do I remediate CVE-2026-49336?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-49336
Is Your Infrastructure Affected by CVE-2026-49336?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.