How severe is CVE-2026-10836?

CVE-2026-10836 has a CVSS 4.0 base score of 5.1, rated medium severity.

Is CVE-2026-10836 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-10836?

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

Does CVE-2026-10836 have an EU (EUVD) identifier?

Yes. CVE-2026-10836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37678.

When was CVE-2026-10836 published?

CVE-2026-10836 was published on 2026-06-17.

CVE-2026-10836

CVE-2026-10836 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.1. 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-644.

Key facts

Severity: Medium (CVSS 4.0 base score 5.1)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37678
Weakness: CWE-644
Published: 2026-06-17
Last modified: 2026-06-17

Description

Improper handling of HTTP headers that allows a remote attacker to manipulate the value of the Host header using specially crafted requests. A successful exploit could result in the generation of manipulated links or responses, potentially leading to limited information disclosure or compromising the integrity of dependent services.

Frequently asked questions

What is CVE-2026-10836?: Improper handling of HTTP headers that allows a remote attacker to manipulate the value of the Host header using specially crafted requests. A successful exploit could result in the generation of manipulated links or responses, potentially leading to limited information disclosure or compromising the integrity of dependent services.
How severe is CVE-2026-10836?: CVE-2026-10836 has a CVSS 4.0 base score of 5.1, rated medium severity.
Is CVE-2026-10836 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-10836?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-10836 have an EU (EUVD) identifier?: Yes. CVE-2026-10836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37678.
When was CVE-2026-10836 published?: CVE-2026-10836 was published on 2026-06-17.

References

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-password-manager

Other CWE-644 vulnerabilities

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CVE-2026-26747 — Critical (CVSS 9.1): A Host Header Poisoning vulnerability exists in Monica 4.1.2 due to improper handling of the HTTP Host header in…
CVE-2026-26234 — High (CVSS 8.8): JUNG Smart Visu Server 1.1.1050 contains a request header manipulation vulnerability that allows unauthenticated…
CVE-2023-32465 — High (CVSS 8.8): Dell Power Protect Cyber Recovery, contains an Authentication Bypass vulnerability. An attacker could potentially…
CVE-2026-33805 — High (CVSS 8.6): @fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection…
CVE-2025-64484 — High (CVSS 8.5): OAuth2-Proxy is an open-source tool that can act as either a standalone reverse proxy or a middleware component…

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