CVE-2026-29168: Apache HTTP Server: mod_md unrestricted OCSP response
CSIRTS triage
- What
- mod_md accepts OCSP responses without proper validation, allowing unrestricted cached responses.
- Who is affected
- Deployments using Apache HTTP Server with mod_md for automated certificate management.
- Urgency
- High priority; unrestricted OCSP responses can serve invalid certificate status and undermine revocation checking.
- Action
- Apply the Apache HTTP Server security patch for CVE-2026-29168 to validate OCSP responses.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-29168
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-291680.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-29168 | coverage & exploitation status | NVD · CVE.org |
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