How severe is CVE-2026-33006?

CVE-2026-33006 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-33006 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33006?

CVE-2026-33006 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33006?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33006 have an EU (EUVD) identifier?

Yes. CVE-2026-33006 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26961.

When was CVE-2026-33006 published?

CVE-2026-33006 was published on 2026-05-04 and last updated on 2026-06-17.

CVE-2026-33006

CVE-2026-33006 is a medium-severity vulnerability in Apache Http Server with a CVSS 3.x base score of 4.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-208.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26961
Weakness: CWE-208
Affected product: Apache Http Server
Published: 2026-05-04
Last modified: 2026-06-17

Description

A timing attack against mod_auth_digest in Apache HTTP Server 2.4.66 allows a bypass of Digest authentication by a remote attacker. Users are recommended to upgrade to version 2.4.67, which fixes this issue.

Frequently asked questions

What is CVE-2026-33006?: A timing attack against mod_auth_digest in Apache HTTP Server 2.4.66 allows a bypass of Digest authentication by a remote attacker. Users are recommended to upgrade to version 2.4.67, which fixes this issue.
How severe is CVE-2026-33006?: CVE-2026-33006 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-33006 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33006?: CVE-2026-33006 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33006?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33006 have an EU (EUVD) identifier?: Yes. CVE-2026-33006 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26961.
When was CVE-2026-33006 published?: CVE-2026-33006 was published on 2026-05-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

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Other CWE-208 vulnerabilities

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CVE-2026-47784 — High (CVSS 8.1): In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because…
CVE-2026-47783 — High (CVSS 8.1): In memcached before 1.6.42, username data for SASL password database authentication has a timing side channel because a…
CVE-2026-42602 — High (CVSS 8.1): azureauthextension is the Azure Authenticator Extension. From 0.124.0 to 0.150.0, a server-side authentication bypass…

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Threat intelligence

Threat-intel indicators referencing this CVE:

37.120.213.13 (ipv4-addr)
50.255.62.89 (ipv4-addr)
147.15.15.226 (ipv4-addr)
218.4.91.163 (ipv4-addr)
45.84.120.3 (ipv4-addr)
79.137.34.248 (ipv4-addr)
77.90.185.88 (ipv4-addr)
77.90.185.87 (ipv4-addr)