Trending
CVE-2026-8856

CVE detail

CVE-2026-8856

IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service in configurations where an attacker has write access to parts of the server configuration.

CVSS 7.7 · HighBuzz score 21.0

Buzz score

Why this CVE is surfacing

Buzz score total 21.0

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 11.0 · diversity 10.0 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

11.0

2 evidence mentions in the snapshot

Diversity score

10.0

2 sources across 2 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 1; within the 30d window
Peak daily: 1; highest bucket

Evidence

Source links by recency

Newest mentions first

2 source links · newest first

NIST Enrichment Reductions Impact CVE Coverage, AccuracyDark Reading
on were required for exploitation. Volerion cited an example of a case where the discrepancies were considerably large. CVE-2026-8856, a denial-of-service flaw in IBM HTTP Server 8.5 and 9.0, received a critical severity rating with a 9.1 CVSS from NIST, while IBM determined it was a medium-severity flaw with a 7.7 score. But Volerion's score was even
newswww.darkreading.comJun 29, 2026, 10:46 PM
https://www.ibm.com/support/pages/node/7274065www.ibm.com
No excerpt available.
Vendor Advisorywww.ibm.comMay 26, 2026, 6:16 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence

CVE-2026-9320
IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are vulnerable to a denial of service, caused by sending a s…
CVSS 5.9 · Medium
1 mention
CVE-2026-9071
IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are vulnerable to a denial of service, caused by sending a s…
CVSS 7.5 · High
1 mention
CVE-2026-8855
IBM HTTP Server 8.5, and 9.0 is vulnerable to remote code execution and denial of service in configurations with TLS mutual authentication (client authentication).
CVSS 8.1 · High
1 mention
CVE-2026-8854
IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_mem_cache.
CVSS 7.5 · High
1 mention
CVE-2026-8835
IBM HTTP Server 8.5, and 9.0 is vulnerable to invalid pointer dereference. A privileged user, authenticated to the Administration Server, could exploit this vulnerability to expos…
CVSS 7.3 · High
1 mention
CVE-2026-8834
IBM HTTP Server 8.5, and 9.0 contains a buffer overflow vulnerability. A privileged user, authenticated to the Administration Server, could exploit this vulnerability to execute r…
CVSS 8.0 · High
1 mention

External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2026-8856.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:o:ibm:aixSearch this product on Shodan
cpe:2.3:a:ibm:http_serverSearch this product on Shodan
cpe:2.3:o:ibm:z\/osSearch this product on Shodan
cpe:2.3:o:linux:linux_kernelSearch this product on Shodan
cpe:2.3:o:microsoft:windowsSearch this product on Shodan

Exact CVE query

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Metadata

Canonical fields

NVD status

Analyzed

Published

May 26, 2026

Modified

Jul 23, 2026

Official record

Authoritative NVD record

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CWE IDs

Vendor classifications

How this vector reads

CVSS 3.1 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Local. The attacker needs local access to the vulnerable system.
Attack Complexity (AC): Low. No special conditions beyond the attacker-controlled steps are required.
Privileges Required (PR): None. The attacker needs no privileges on the vulnerable system.
User Interaction (UI): None. Exploitation does not require another user to act.
Scope (S): Unchanged. Impacts remain within the vulnerable security authority.
Confidentiality Impact (C): None. There is no direct impact to this security property.
Integrity Impact (I): High. There is a total or serious impact to this security property.
Availability Impact (A): High. There is a total or serious impact to this security property.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses