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Medium, CVSS 6.9amended

postgres-protocol: Panic decoding a malformed hstore value allows denial of service

GHSA-rgqc-3x5p-6gwg

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (postgres-protocol 0.6.12), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N · score source
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

A malicious or compromised server can return a binary hstore value with an invalid internal length field, causing the client to panic while decoding it. Applications that connect only to a trusted database are not exposed; the risk applies to clients that may connect to untrusted or user-supplied servers, or whose connection can be intercepted by a man-in-the-middle.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-rgqc-3x5p-6gwg

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-rgqc-3x5p-6gwg

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: GHSA-rgqc-3x5p-6gwg

Advisory: postgres-protocol: Panic decoding a malformed `hstore` value allows denial of service
IDs: GHSA-rgqc-3x5p-6gwg
Record: https://patchnext.com/advisories/ghsa-rgqc-3x5p-6gwg (revision 3, source checked 26 Oct 2026, 15:43 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: postgres-protocol 0.6.12. A vendor fix does not mean a deployment is fixed.

## Affected components
- crates.io postgres-protocol: affected < 0.6.12; fixed in 0.6.12

## Suggested inspection (read-only)
- crates.io postgres-protocol: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on postgres-protocol.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-rgqc-3x5p-6gwg (OSV record GHSA-rgqc-3x5p-6gwg lists affected ranges: crates.io postgres-protocol >=0 <0.6.12 (fixed))
- Verified: https://github.com/advisories/GHSA-rgqc-3x5p-6gwg (GitHub-reviewed advisory GHSA-rgqc-3x5p-6gwg lists affected ranges: crates.io postgres-protocol >=0 <0.6.12)

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