Medium severity · published Sep 23, 2026
CVE-2026-88837
Busybox: busybox: httpd misidentifies yescrypt password hashes as plaintext, inverting authentication
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
BusyBox httpd treats yescrypt ($y$) password hashes as plaintext during Basic Authentication, inverting the authentication check.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Hardened Images · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-88837
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-88837
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:72111
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-88837
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2531351
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