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VulnerabilityPublished Updated

CVE-2026-88837: Red Hat Hardened Images · Authentication Bypass by Primary Weakness

Affects Red Hat Hardened ImagesSource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium.

Data as of 5 Nov 2026, 23:24 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 19% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red HatRed Hat Hardened ImagesAffected–Fixed in–

AI-suggested

Red Hat has released updated BusyBox packages (busybox-1.37.0-9.1.hum1 and related) that fix this vulnerability. Users of Red Hat Hardened Images should apply these updates promptly. Refer to the Red Hat advisory RHSA-2026:72111 for detailed update instructions. No other mitigation is indicated or required beyond applying the official fix.

Description

CVE-2026-88837 is a vulnerability in BusyBox httpd used in Red Hat Hardened Images where yescrypt ($y$) password hashes are incorrectly treated as plaintext during Basic Authentication, causing an inversion of the authentication check. This flaw can lead to authentication bypass. Red Hat has released an update to BusyBox packages to address this issue.

References

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