Skip to content
Patch Next
Sign inAdd to your agent

← Actionable
High, CVSS 7.5amended

OliveTin: Unauthenticated DoS via OAuth2 State Memory Exhaustion (Unbounded Map Growth)

CVE-2026-67437GHSA-xpxj-f2fm-rqch

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/OliveTin/OliveTin 0.0.0-20260708075951-ec114e95d297), 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.

Add to your agent

Affected packages

  • Go github.com/OliveTin/OliveTin

    Affected
    >= 0.0.0-20251024001301-45f9c18bc3ee, < 0.0.0-20260708075951-ec114e95d297
    Fixed in
    0.0.0-20260708075951-ec114e95d297

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
  • CVE-2026-67437: 0.64% estimated exploitation activity in the next 30 days; percentile 50.56 (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.

Summary OliveTin's OAuth2 login handler stores per-login state in an in-memory map (registeredStates) that grows unboundedly. States are added on every /oauth/login request but are never deleted or expired. An unauthenticated attacker can send millions of requests to /oauth/login to fill the map with state entries, exhausting server memory and causing a denial of service. This is distinct from CVE-2026-28789 (concurrent map writes crash). That CVE was about the panic from unsynchronized map access — the fix added a sync.RWMutex. This vulnerability is about the unbounded growth of the map even WITH the mutex, as no cleanup mechanism exists. Affected Versions - All versions with OAuth2 support, including = 3000.10.3 (which patched CVE-2026-28789) Details In service/internal/auth/otoauth2/restapiauthoauth2.go: The HandleOAuthLogin handler adds a new state on every request: The HandleOAuthCallback handler updates existing states but never removes them: There is no TTL, no expiry check,…

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

    Amended from ghsa record GHSA-xpxj-f2fm-rqch

  2. Revision 2 · amended ·

    Amended from osv record GO-2026-6146

  3. Revision 1 · created ·

    Published from osv record GHSA-xpxj-f2fm-rqch

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-2026-67437

Advisory: OliveTin: Unauthenticated DoS via OAuth2 State Memory Exhaustion (Unbounded Map Growth)
IDs: CVE-2026-67437, GHSA-xpxj-f2fm-rqch
Record: https://patchnext.com/advisories/cve-2026-67437 (revision 3, source checked 26 Oct 2026, 15:27 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/OliveTin/OliveTin 0.0.0-20260708075951-ec114e95d297. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/OliveTin/OliveTin: affected >= 0.0.0-20251024001301-45f9c18bc3ee, < 0.0.0-20260708075951-ec114e95d297; fixed in 0.0.0-20260708075951-ec114e95d297

## Suggested inspection (read-only)
- Go github.com/OliveTin/OliveTin: 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/OliveTin/OliveTin.
- 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/GO-2026-6146 (OSV record GO-2026-6146 lists affected ranges: Go github.com/OliveTin/OliveTin >=0.0.0-20251024001301-45f9c18bc3ee <0.0.0-20260708075951-ec114e95d297 (fixed))
- Verified: https://osv.dev/vulnerability/GHSA-xpxj-f2fm-rqch (OSV record GHSA-xpxj-f2fm-rqch lists affected ranges: Go github.com/OliveTin/OliveTin >=0.0.0-20251024001301-45f9c18bc3ee <0.0.0-20260708075951-ec114e95d297 (fixed))
- Verified: https://github.com/advisories/GHSA-xpxj-f2fm-rqch (GitHub-reviewed advisory GHSA-xpxj-f2fm-rqch lists affected ranges: Go github.com/OliveTin/OliveTin >=0.0.0-20251024001301-45f9c18bc3ee <0.0.0-20260708075951-ec114e95d297)

Commands are suggestions: review each one before running it.

Loading voting…