GHSA-2m8c-2374-465f: Duplicate Advisory Cache Poisoning Vulnerability

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Advisory Summary

GHSA-2m8c-2374-465f is a HIGH cache poisoning vulnerability (General Security Weakness) affecting Duplicate Advisory libraries in the crates.io ecosystem. The issue involves cache poisoning via insecure-by-default cache key. Remediation is available by upgrading affected packages to version 0.8.0.

GHSA-2m8c-2374-465f at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-2m8c-2374-465f
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Duplicate Advisory
Package Ecosystem crates.io
Published Date
Last Updated

How to Fix GHSA-2m8c-2374-465f

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

pingora-cache fixed: 0.8.0 
Upgrade pingora-cache to 0.8.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for pingora-cache

How to Check if You Are Affected

To determine whether your application is affected by GHSA-2m8c-2374-465f, inspect your project dependencies for Duplicate Advisory:

inspect dependencies for pingora-cache

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.8.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-f93w-pcj3-rggc. This link is maintained to preserve external references. ### Original Description A cache poisoning vulnerability has been found in the Pingora HTTP proxy framework’s default cache key construction. The issue occurs because the default HTTP cache key implementation generates cache keys using only the URI path, excluding critical factors such as the host header (authority). Operators relying on the default are vulnerable to cache poisoning, and cross-origin responses may be improperly served to users. Impact This vulnerability affects users of Pingora's alpha proxy caching feature who relied on the default CacheKey implementation. An attacker could exploit this for: * Cross-tenant data leakage: In multi-tenant deployments, poison the cache so that users from one tenant receive cached responses from another tenant * Cache poisoning attacks: Serve malicious content to legitimate users by poisoning shared cache entries Cloudflare's CDN infrastructure was not affected by this vulnerability, as Cloudflare's default cache key implementation uses multiple factors to prevent cache key poisoning and never made use of the previously provided default. Mitigation: We strongly recommend Pingora users to upgrade to Pingora v0.8.0 or higher, which removes the insecure default cache key implementation. Users must now explicitly implement their own callback that includes appropriate factors such as Host header, origin server HTTP scheme, and other attributes their cache should vary on. Pingora users on previous versions may also remove any of their default CacheKey usage and implement their own that should at minimum include the host header / authority and upstream peer’s HTTP scheme.

GHSA-2m8c-2374-465f Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
0.8.0
Product / Package Ecosystem Affected Versions Fixed Version
pingora-cache
 crates.io
< 0.8.0
0.8.0

References

NVD — GHSA-2m8c-2374-465f NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2836
Duplicate Advisory Source Repository REPOSITORY
https://github.com/cloudflare/pingora
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2026-0035.html

Frequently Asked Questions

What is GHSA-2m8c-2374-465f?
GHSA-2m8c-2374-465f is a security vulnerability in Duplicate Advisory involving Cache poisoning via insecure-by-default cache key under General Security Weakness.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 0.8.0 across affected packages: pingora-cache.
What version fixes GHSA-2m8c-2374-465f?
Upgrading to 0.8.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pingora-cache affected?
Yes, pingora-cache is affected in releases prior to 0.8.0. Upgrade your dependency to 0.8.0 or later.
What CWE is associated with GHSA-2m8c-2374-465f?
GHSA-2m8c-2374-465f is classified under General Security Weakness.
How can I check crates.io dependencies for GHSA-2m8c-2374-465f?
Run the dependency tree command: 'inspect dependencies for pingora-cache'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2m8c-2374-465f",
  "modified" : "2026-03-05T20:57:23Z",
  "published" : "2026-03-05T00:31:11Z",
  "withdrawn" : "2026-03-05T20:57:23Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Cache poisoning via insecure-by-default cache key",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-f93w-pcj3-rggc. This link is maintained to preserve external references.\n\n### Original Description\nA cache poisoning vulnerability has been found in the Pingora HTTP proxy framework’s default cache key construction. The issue occurs because the default HTTP cache key implementation generates cache keys using only the URI path, excluding critical factors such as the host header (authority). Operators relying on the default are vulnerable to cache poisoning, and cross-origin responses may be improperly served to users.\n\n\nImpact\n\nThis vulnerability affects users of Pingora's alpha proxy caching feature who relied on the default CacheKey implementation. An attacker could exploit this for:\n\n  *  Cross-tenant data leakage: In multi-tenant deployments, poison the cache so that users from one tenant receive cached responses from another tenant\n\n\n  *  Cache poisoning attacks: Serve malicious content to legitimate users by poisoning shared cache entries\n\n\n\n\nCloudflare's CDN infrastructure was not affected by this vulnerability, as Cloudflare's default cache key implementation uses multiple factors to prevent cache key poisoning and never made use of the previously provided default.\n\n\nMitigation:\n\nWe strongly recommend Pingora users to upgrade to Pingora v0.8.0 or higher, which removes the insecure default cache key implementation. Users must now explicitly implement their own callback that includes appropriate factors such as Host header, origin server HTTP scheme, and other attributes their cache should vary on.\n\n\nPingora users on previous versions may also remove any of their default CacheKey usage and implement their own that should at minimum include the host header / authority and upstream peer’s HTTP scheme.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "pingora-cache"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.8.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-2836"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cloudflare/pingora"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2026-0035.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-05T20:57:23Z",
    "nvd_published_at" : "2026-03-05T00:15:58Z"
  }
}