CVE-2026-107292

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1% (2nd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
6.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.34.0 until 2.30.0, the Agent.to_web() and clai web development chat server does not validate the Host header, allowing a website visited by a developer to use DNS rebinding to reach a loopback-hosted agent as a same-origin service. The hostile page can read the served UI and submit chat requests that execute agent tools with the local process's privileges and credentials, causing data disclosure or unwanted side effects. Binding to localhost, Origin checks, and CSRF tokens do not prevent the same-origin DNS rebinding path. This issue is fixed in versions 1.107.5 and 2.30.0.

CVSS v3
6.4
EG Score
6.4MEDIUMmedium confidence
EG Risk
33
EG Risk 33/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity64% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
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
0.1%
EPSS %ILE
2nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or 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 none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 8, 2026

Last Modified

October 8, 2026

Advisory Details (7)

Auto-updated Oct 8, 2026
Patch available. Sources: github_release, github, github_commit, github_pr.
githubMentions a patch (unverified)

Web chat UI (`Agent.to_web()`, `clai web`): the local chat endpoint does not validate the `Host` header, so DNS rebinding can reach it from a website the developer visits · Advisory · pydantic/pydantic-ai · GitHub

https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-q2xc-rrxj-58x9
github_release Patch Available

v2.30.0 (2026-08-13)

Patch available: pydantic/pydantic-ai v2.30.0

https://github.com/pydantic/pydantic-ai/releases/tag/v2.30.0
github_release Patch Available

v1.107.5 (2026-08-13)

Patch available: pydantic/pydantic-ai v1.107.5

https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.5
github_pr

Add `allowed_hosts` to `Agent.to_web()` and `clai web` (v1 backport)

Fix merged in pydantic/pydantic-ai PR #7438 on 2026-08-13 — awaiting tagged release

https://github.com/pydantic/pydantic-ai/pull/7438
github_pr Patch Available

Add `allowed_hosts` to `Agent.to_web()` and `clai web`

Patch available: pydantic/pydantic-ai v2.32.0 (PR #7437 merged 2026-08-13)

https://github.com/pydantic/pydantic-ai/pull/7437
github_commit Patch Available

commit 871c7aeec5df (pydantic/pydantic-ai)

Patch available: pydantic/pydantic-ai v2.32.0 (contains commit 871c7aeec5df)

https://github.com/pydantic/pydantic-ai/commit/871c7aeec5dfed2138655ccbccbf15c6d763bae7
github_commit

commit 394cc1d31656 (pydantic/pydantic-ai)

Fix landed in pydantic/pydantic-ai commit 394cc1d31656 — awaiting tagged release

https://github.com/pydantic/pydantic-ai/commit/394cc1d31656620704a703a2daed752afa5135fe

Vendor Advisories for CVE-2026-107292(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 1 ecosystem)
PyPI(2)
PackageVulnerable rangeFix by version rangeDependents
pydantic-ai1.100.0 ... 1.99.0 (83 versions)
  • 1.34.0 up to 1.107.5: fixed in 1.107.5
  • 2.0.0b1 up to 2.30.0: fixed in 2.30.0
—
pydantic-ai-slim1.100.0 ... 1.99.0 (83 versions)
  • 1.34.0 up to 1.107.5: fixed in 1.107.5
  • 2.0.0b1 up to 2.30.0: fixed in 2.30.0
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 5× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-10-09 21:14 UTCEG score recompute
  2. 2026-10-09 20:06 UTCEPSS rescore
  3. 2026-10-08 17:26 UTCEG score recompute
  4. 2026-10-08 16:32 UTCEG score recompute
  5. 2026-10-08 16:31 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-107292?
CVE-2026-107292 is a medium vulnerability published on October 8, 2026. Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.34.0 until 2.30.0, the Agent.to_web() and clai web development chat server does not validate the Host header, allowing a website visited by a developer to use DNS rebinding to reach a…
When was CVE-2026-107292 disclosed?
CVE-2026-107292 was first published on October 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-107292 actively exploited?
CVE-2026-107292 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107292?
CVE-2026-107292 has a CVSS base score of 6.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-107292?
A fix for CVE-2026-107292 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-107292 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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