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Medium, CVSS 6.5

dhowden tag panic due to out-of-bounds read

CVE-2020-29243GHSA-9wm7-rc47-g56m

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/dhowden/tag 0.0.0-20201120070457-d52dcb253c63), 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
6.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS
  • CVE-2020-29243: 1.12% estimated exploitation activity in the next 30 days; percentile 66.31 (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.

Due to improper bounds checking, a number of methods in dhowden tag before 0.0.0-20201120070457-d52dcb253c63 can trigger a panic via readAPICFrame due to attempted out-of-bounds reads. If the package is used to parse user supplied input, this may be used as a vector for a denial of service attack.

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

    Published from ghsa record GHSA-9wm7-rc47-g56m

Agent brief

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

# Patch Next advisory brief: CVE-2020-29243

Advisory: dhowden tag panic due to out-of-bounds read
IDs: CVE-2020-29243, GHSA-9wm7-rc47-g56m
Record: https://patchnext.com/advisories/cve-2020-29243 (revision 1, source checked 26 Oct 2026, 15:04 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/dhowden/tag 0.0.0-20201120070457-d52dcb253c63. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/dhowden/tag: affected < 0.0.0-20201120070457-d52dcb253c63; fixed in 0.0.0-20201120070457-d52dcb253c63

## Suggested inspection (read-only)
- Go github.com/dhowden/tag: 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 github.com/dhowden/tag.
- 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-9wm7-rc47-g56m (GitHub-reviewed advisory GHSA-9wm7-rc47-g56m lists affected ranges: Go github.com/dhowden/tag >=0 <0.0.0-20201120070457-d52dcb253c63)

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