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CVE-2026-86049

🗓️ 17 Sep 2026 21:17:00Reported by ubuntu.comType 
ubuntucve
 ubuntucve
🔗 ubuntu.com👁 20 Views

Jupyter Server before 2.21.0 writes Referer token to 5xx logs in plaintext, enabling token recovery.

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Packages
Refs
ReporterTitlePublishedViews
Family
cgr
Chainguard
CVE-2026-86049 vulnerabilities
19 Sep 202608:54
–cgr
circl
Circl
CVE-2026-86049
17 Sep 202622:35
–circl
cve
CVE
CVE-2026-86049
17 Sep 202620:28
–cve
cvelist
Cvelist
CVE-2026-86049 Jupyter Server: 5xx request logging leaks token-bearing Referer header values
17 Sep 202620:28
–cvelist
debiancve
Debian CVE
CVE-2026-86049
17 Sep 202620:28
–debiancve
euvd
EUVD
EUVD-2026-82436
17 Sep 202620:28
–euvd
github
Github Security Blog
Jupyter Server: 5xx request logging leaks token-bearing Referer header values
17 Sep 202620:28
–github
mend
Mend
CVE-2026-86049
17 Sep 202620:28
–mend
nvd
NVD
CVE-2026-86049
17 Sep 202621:17
–nvd
osv
OSV
CGA-C88H-Q325-2J7H
18 Sep 202613:48
–osv
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Ubuntu22.04alljupyter-server0jupyter-server_0_all.deb
Ubuntu24.04alljupyter-server0jupyter-server_0_all.deb
Ubuntu26.04alljupyter-server0jupyter-server_0_all.deb

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24 Sep 2026 01:04Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.1
EPSS0.00416
SSVC
20