CVE-2026-34993Hinoki check available

Arbitrary code execution via malicious pickle loading

Published Jun 2, 2026 · Updated Aug 28, 2026

Deserialization of untrusted data in aiohttp before 3.14.0 allows attackers to execute arbitrary code through a crafted cookie file. CookieJar.load opens the supplied file and passes legacy content to unrestricted pickle.load, which invokes attacker-selected reconstruction globals. Exploitation requires an application or user to load an attacker-controlled cookie file; ordinary use with application-owned cookie data is not exposed.

CVSS severity6.4
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Deserialization of untrusted data in aiohttp before 3.14.0 allows attackers to execute arbitrary code through a crafted cookie file. CookieJar.load opens the supplied file and passes legacy content to unrestricted pickle.load, which invokes attacker-selected reconstruction globals. Exploitation requires an application or user to load an attacker-controlled cookie file; ordinary use with application-owned cookie data is not exposed.

The record

CVE
CVE-2026-34993
Published
Jun 2, 2026
Updated
Aug 28, 2026
Vendor
389 Directory Server
Product
Red Hat OpenShift Lightspeed
Classifications
CWE-502, T1204.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat OpenShift LightspeedAffected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift AIAffected versions are unavailable in this record.
389 Directory Server · Migration Toolkit for ApplicationsAffected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux AIAffected versions are unavailable in this record.
389 Directory Server · Red Hat DiscoveryAffected versions are unavailable in this record.
389 Directory Server · Red Hat Ansible Automation PlatformAffected versions are unavailable in this record.
aio-libs · aiohttpversion=< 3.14.0
389 Directory Server · Red Hat SatelliteAffected versions are unavailable in this record.
389 Directory Server · Exploit IntelligenceAffected versions are unavailable in this record.
389 Directory Server · Red Hat Update InfrastructureAffected versions are unavailable in this record.
389 Directory Server · Red Hat AI Inference ServerAffected versions are unavailable in this record.

Published CVSS scores

7.2Red HatCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
6.4GitHubCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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