CVE-2021-26690
mod_session NULL pointer dereference
7.5
HIGH
CVSS 3.1
EPSS 60.4%
Description
Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can cause a NULL pointer dereference and crash, leading to a possible Denial Of Service
How to fix CVE-2021-26690
To remediate CVE-2021-26690, upgrade the affected package to a fixed version below.
- Alpine/apache2—upgrade to 2.4.48-r0 or later
- —upgrade to 2.4.47 or later
- —upgrade to 2.4.46-6 or later
Is CVE-2021-26690 being exploited?
Likely — EPSS is 60.4%, placing CVE-2021-26690 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (3)
- from 0, < 2.4.48-r0
- >= 2.4.0, < 2.4.47
- from 0, < 2.4.46-6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |