LangChain is a framework for building agents and LLM-powered applications. Prior to version 1.2.22, multiple functions in langchain_core.prompts.loading read files from paths embedded in deserialized config dicts without validating against directory traversal or absolute path injection. When an application passes user-influenced prompt configurations to load_prompt() or load_prompt_from_config(), an attacker can read arbitrary files on the host filesystem, constrained only by file-extension checks (.txt for templates, .json/.yaml for examples). This issue has been patched in version 1.2.22.
CVE-2026-34070
“—” beside the score: it is equal to the CVSS score beside it.
This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.4% (73rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-17283 (ENISA EUVD)Source: ENISA EUVD
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 65EG Risk 65/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 1.4%
- EPSS %ILE
- 73rd
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
- EG Likelihood
- 1.4% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
March 31, 2026
Last Modified
August 25, 2026
Advisory Details (3)
Auto-updated Jun 10, 2026Path traversal in legacy `load_prompt` functions in `langchain-core` (CWE-22) · Advisory · langchain-ai/langchain · GitHub
https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54langchain-core==1.2.22
Patch available: langchain-ai/langchain langchain-core==1.2.22
https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22commit 27add913474e (langchain-ai/langchain)
Patch available: langchain-ai/langchain langchain==1.3.0a2 (contains commit 27add913474e)
https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47cVendor Advisories for CVE-2026-34070(3)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:59159Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Container Release Update
- RHSA-2026:37275Red Hat Product SecurityCritical
Red Hat Security Advisory: RHOAI 3.3.5 - Red Hat OpenShift AI
- RHSA-2026:24766Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Container Release Update
Patch Availability(3)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | ansible-automation-platform-25/lightspeed-rhel8:1787229385 | 2026-08-24 | redhat |
| redhat | rhoai/odh-trustyai-nemo-guardrails-server-rhel9:1782471606 | 2026-07-09 | redhat |
| redhat | ansible-automation-platform-25/lightspeed-rhel8:1780082949 | 2026-06-09 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| langchain-core | 0.0.1 ... 1.2.9 (264 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 39× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 98 of 230 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 132 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 1.4% · 73rd percentile
- 2026-10-28 16:32 UTCEPSS rescoreEPSS 1.4% · 73rd percentile
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 1.4% · 72nd percentile
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 1.4% · 71st percentile
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 1.4% · 71st percentile
- 2026-10-25 14:34 UTCEG score recompute
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-24 16:21 UTCEG score recompute
- 2026-10-24 16:21 UTCVendor advisory
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-21 16:32 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-18 03:46 UTCEG score recompute
- 2026-10-17 16:34 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-17 15:40 UTCEG score recompute
- 2026-10-17 15:40 UTCVendor advisory
- 2026-10-16 16:41 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-12 16:12 UTCEG score recompute
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- 2026-10-11 19:55 UTCEG score recompute
- 2026-10-11 17:08 UTCEG score recompute
- 2026-10-11 14:35 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-08 17:12 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-02 13:41 UTCOSV refresh
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-09-26 00:26 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-17 19:30 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-15 03:11 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-13 11:54 UTCOSV refresh
- 2026-09-12 15:01 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-11 09:37 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-02 14:12 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-01 13:53 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-09-01 04:39 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.4% · 69th percentile
- 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.4% · 69th percentile
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.4% · 70th percentile
- 2026-08-25 13:49 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-25 13:25 UTCEG score recompute
- 2026-08-25 13:25 UTCVendor advisory
- 2026-08-25 12:22 UTCEG score recompute
- 2026-08-25 12:22 UTCVendor advisory
- 2026-08-24 14:17 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-19 17:03 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-17 13:47 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-16 14:56 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-16 09:42 UTCEG score recompute
- 2026-08-16 09:42 UTCVendor advisory
- 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-14 19:07 UTCVendor advisory
- 2026-08-14 06:06 UTCEG score recompute
- 2026-08-14 06:06 UTCVendor advisory
- 2026-08-13 22:00 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-12 20:26 UTCEG score recompute
- 2026-08-12 20:26 UTCVendor advisory
- 2026-08-12 13:50 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-11 20:39 UTCEG score recompute
- 2026-08-11 20:39 UTCVendor advisory
- 2026-08-11 03:39 UTCEG score recompute
- 2026-08-11 03:39 UTCVendor advisory
- 2026-08-11 00:00 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-08-10 06:43 UTCVendor advisory
- 2026-08-09 18:12 UTCEG score recompute
Related CVEs(same product + same vendor + same CWE)
Same product
8 shownPyPI:langchain-core
Same vendor
10 shownredhat:RHSA-2026:37275 · redhat:RHSA-2026:24766
Frequently asked(5)
What is CVE-2026-34070?
When was the CVE record for CVE-2026-34070 published?
Is CVE-2026-34070 actively exploited?
What is the CVSS score of CVE-2026-34070?
How do I remediate CVE-2026-34070?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-34070
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