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Critical, CVSS 9.2

panic on parsing crafted phonenumber inputs

CVE-2024-39697GHSA-mjw4-jj88-v687

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (phonenumber 0.3.6), 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

  • crates.io phonenumber

    Affected
    >= 0.3.4, < 0.3.6
    Fixed in
    0.3.6

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
9.2 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H · score source
EPSS
  • CVE-2024-39697: 0.71% estimated exploitation activity in the next 30 days; percentile 53.60 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Impact The phonenumber parsing code may panic due to a reachable assert! guard on the phonenumber string. In a typical deployment of rust-phonenumber, this may get triggered by feeding a maliciously crafted phonenumber, e.g. over the network, specifically strings of the form +dwPAA;phone-context=AA, where the "number" part potentially parses as a number larger than 2^56. Since f69abee1/0.3.4/#52. 0.2.x series is not affected. Patches Upgrade to 0.3.6 or higher. Workarounds n/a References Whereas https://github.com/whisperfish/rust-phonenumber/issues/69 did not provide an example code path, property testing found a few: +dwPAA;phone-context=AA.

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

    Published from ghsa record GHSA-mjw4-jj88-v687

Agent brief

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# Patch Next advisory brief: CVE-2024-39697

Advisory: panic on parsing crafted phonenumber inputs
IDs: CVE-2024-39697, GHSA-mjw4-jj88-v687
Record: https://patchnext.com/advisories/cve-2024-39697 (revision 1, source checked 26 Oct 2026, 15:38 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.2)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: phonenumber 0.3.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- crates.io phonenumber: affected >= 0.3.4, < 0.3.6; fixed in 0.3.6

## Suggested inspection (read-only)
- crates.io phonenumber: 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 phonenumber.
- 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://github.com/advisories/GHSA-mjw4-jj88-v687 (GitHub-reviewed advisory GHSA-mjw4-jj88-v687 lists affected ranges: crates.io phonenumber >=0.3.4 <0.3.6)

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