CVE catalog

CVE-2026-88837

BusyBox httpd treats yescrypt ($y$) password hashes as plaintext during Basic Authentication, inverting the authentication check.

[CVE catalog]

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Published: Sep 23, 2026, 4:35:00 PM UTC
Updated: Sep 23, 2026, 6:17:10 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.27% · Oct 27, 2026

BusyBox httpd treats yescrypt ($y$) password hashes as plaintext during Basic Authentication, inverting the authentication check.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	busybox	sid	`1:1.38.0-3`	vulnerable
Debian	busybox	forky	`1:1.38.0-3`	vulnerable
Debian	busybox	trixie	`1:1.37.0-6`	vulnerable
Debian	busybox	bookworm	`1:1.35.0-4+deb12u1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	busybox	source	sid	`(unfixed)`	not yet assigned	Not reported	[1151051]
Debian	busybox	source	forky	`(unfixed)`	not yet assigned	Not reported	[1151051]
Debian	busybox	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1151051]
Debian	busybox	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1151051]

[Debian bug #1151051]

Notes

[trixie] busybox: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[busybox]Affected
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
[busybox-static]Affected
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
[busybox-syslogd]Affected
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1 · all · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
- 1:1.35.0-4+deb12u1 · all · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
[udhcpc]Affected
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
[udhcpd]Affected
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12

[Debian 13 (Trixie)]

[busybox]Affected
Source package: [busybox]
Details (2)
- 1:1.37.0-6+b8 · amd64 · trixie
  Affected
  nvd · busybox · debian · 13
- 1:1.37.0-6+b8 · arm64 · trixie
  Affected
  nvd · busybox · debian · 13
[busybox-static]Affected
Source package: [busybox]
Details (2)
- 1:1.37.0-6+b8 · amd64 · trixie
  Affected
  nvd · busybox · debian · 13
- 1:1.37.0-6+b8 · arm64 · trixie
  Affected
  nvd · busybox · debian · 13
[busybox-syslogd]Affected
Source package: [busybox]
Details (2)
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13
[udhcpc]Affected
Source package: [busybox]
Details (2)
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13
[udhcpd]Affected
Source package: [busybox]
Details (2)
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13

Observed: Oct 23, 2026, 8:36:00 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]