vulnerability / NVI-00003847 / Revision 4
Diactoros before 2.11.1 vulnerable to HTTP Host Header Attack
OSV carries this publisher advisory for laminas/laminas-diactoros. This is an aggregated source copy; consult the original publisher and compare update dates.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
7.2 HIGH (3.1)
security-advisories@github.com severity; no combined Null risk score.
6.1 MEDIUM (3.1)
nvd@nist.gov severity; no combined Null risk score.
0.796%
FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.56479. Missing scores are unknown.
As of · FIRST EPSS
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
laminas/laminas-diactoros
source listedECOSYSTEM: introduced 0; fixed 2.11.1
### Impact Applications that use Diactoros, and are either not behind a proxy, or can be accessed via untrusted proxies, can potentially have the host, protocol, and/or port of a `Laminas\Diactoros\Uri` instance associated with the incoming server request modified to reflect values from `X-Forwarded-*` headers. Such changes can potentially lead to XSS attacks (if a fully-qualified URL is used in links) and/or URL poisoning. ### Patches Any version after 2.11.0. Starting in laminas/laminas-diactoros 2.11.1, we have added `Laminas\Diactoros\ServerRequestFilter\FilterServerRequestInterface`, which defines the single method `__invoke(Psr\Http\Message\ServerRequestInterface $request): Psr\Http\Message\ServerRequestInterface`. Filters implementing this interface allow modifying and returning a generated `ServerRequest`. The primary use case of the interface is to allow modifying the generated URI based on the presence of headers such as `X-Forwarded-Host`. When operating behind a reverse proxy, the `Host` header is often rewritten to the name of the node to which the request is being forwarded, and an `X-Forwarded-Host` header is generated with the original `Host` value to allow the
03 / Response
What to do next
- vendor patch
The original advisory lists fixed boundaries 2.11.1 for laminas/laminas-diactoros. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. FIRST EPSS
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
- NVD lastModified does not establish freshness of every associated CPE record.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-8274-h5jp-97vr ↗
GitHub Advisory Database via OSV · vendor advisory
Observed . GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.
- CVE-2022-31109 ↗
NIST National Vulnerability Database · official catalog
Observed . This product uses data from the NVD API but is not endorsed or certified by the NVD.
- CVE-2022-31109 ↗
FIRST EPSS · official catalog
Observed . FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 4 ·
Source facts changed; compare the preserved prior revision.
- Revision 2 ·
Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.