CVE-2025-68664VulnerabilityPublished 30 Jan 2026Updated 7 Sep 2026

Red Hat Security Advisory: Red Hat OpenShift Lightspeed 1.0.9 security update

Affects Red HatSource GCVE Database

Authoritative record:CVE-2025-68664· Critical 9.3

Not known to be exploited · public exploit available (Exploit-DB) · 42% EPSS · CVSS 9.3 Critical : upgrade Red Hat to 1.2.5 or 0.3.81 as a priority.

Data as of 26 Oct 2026, 08:30 UTC

CVSS base score

9.3Critical

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 42.9% chance of exploitation in 30 days – higher than 98% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 1.2.5, 0.3.81

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

Disclosed: evidence found.
CVE published 23 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
1 Exploit-DB entry, 127 days after disclosure
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

CVE ID reserved
by GitHub_M
22 Dec 202523:28 UTC, 23 hours before disclosure
CVE published
on cve.org
23 Dec 202522:47 UTC, t = 0
In Threat Radar
record ingested
23 Dec 202522:56 UTC, 9 minutes after disclosure
First Exploit-DB entry (opens in a new tab)
LangChain Core 1.2.4 - SSTI/RCE
29 Apr 2026, 127 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade langchain to 1.2.5 or 0.3.81.

Affected software

Product	Affected	Fixed in
PyPIlangchain`pkg:pypi/langchain`Other threats	Affected <0.3.81 <1.2.5	Fixed in 0.3.81 1.2.5

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released OpenShift Lightspeed version 1.0.9 containing security fixes for this vulnerability. Users should update to version 1.0.9 or later. Before applying this update, ensure all previously released errata relevant to your system have been applied. Refer to Red Hat's official update instructions at https://access.redhat.com/articles/11258. No alternative mitigations are specified; applying the official update is the recommended remediation.

Description

Red Hat OpenShift Lightspeed is a generative AI-based virtual assistant integrated into the OpenShift console. It can answer questions related to OpenShift and layered offerings. Security Fix(es): langchain-core: LangChain: Arbitrary code execution via serialization injection (CVE-2025-68664) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.`

Impact

The vulnerability allows remote attackers to achieve arbitrary code execution on affected systems running Red Hat OpenShift Lightspeed versions prior to 1.0.9. This can lead to full compromise of the affected system. The flaw impacts confidentiality and integrity with high severity, as untrusted serialized data can be manipulated to execute malicious code. There are no known exploits in the wild at the time of this advisory.

Summary

CVE-2025-68664 is a critical vulnerability in LangChain's dumps() and dumpd() serialization functions, leveraged by Red Hat OpenShift Lightspeed. The vulnerability arises because these functions do not properly escape dictionaries containing the internal 'lc' key during serialization. When user input includes this key, it is incorrectly deserialized as a legitimate LangChain object, enabling remote attackers to execute arbitrary code. This deserialization flaw is classified under CWE-502 (Deserialization of Untrusted Data). Red Hat has issued a security advisory (RHSA-2026:1610) and released OpenShift Lightspeed version 1.0.9 with security fixes to mitigate this issue.

CWE-502Deserialization of Untrusted Data (opens in a new tab)
Base weaknessLikelihood of exploit: MediumCWE Top 25 (2025): #15OWASP Top 10 A08:2025: Software or Data Integrity Failures (opens in a new tab)
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
Architecture and Design · Implementation
If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
Implementation
When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
Implementation
Explicitly define a final object() to prevent deserialization.
OWASP Cheat Sheets
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
XML Security (opens in a new tab)
XML External Entity Prevention (opens in a new tab)
Software Supply Chain Security (opens in a new tab)
OWASP ASVS 4.0.3
V1.5.2 (opens in a new tab)
V5.5.3 (opens in a new tab)
V5.5.1 (opens in a new tab)
Attack patterns
Object Injection (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

Loading reviews…

Exploitation evidence

Timeline

What to do

Affected software

Description

AI analysisMachine-generated, updated 17 Aug 2026, 18:06 UTC

Public exploits and detection1 Exploit-DB entry

WeaknessesCWE-502

Technical details

References

Community reviews

Related threats