CVE-2026-107294

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: 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 1.77.0 until 1.107.2 and 2.24.0, web_fetch_tool, the WebFetch local fallback, and remote FileUrl media downloads buffer the complete HTTP response body before enforcing content-size controls. An attacker-influenced URL can stream an arbitrarily large response that exhausts process memory and crashes the worker; affected media types include ImageUrl, DocumentUrl, VideoUrl, and AudioUrl. SSRF protections remain effective, and the impact is limited to availability. This issue is fixed in versions 1.107.2 and 2.24.0.

CVSS v3
6.5
EG Score
6.5MEDIUMlow confidence
EG Risk
29
EG Risk 29/100CISA 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
35th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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 9, 2026

Advisory Details (7)

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

Unbounded memory use when downloading remote content via web_fetch or FileUrl · Advisory · pydantic/pydantic-ai · GitHub

https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-v2xh-2vp8-57h8
github_release Patch Available

v2.24.0 (2026-08-04)

Patch available: pydantic/pydantic-ai v2.24.0

https://github.com/pydantic/pydantic-ai/releases/tag/v2.24.0
github_release Patch Available

v1.107.2 (2026-08-07)

Patch available: pydantic/pydantic-ai v1.107.2

https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.2
github_pr

Bound HTTP response body sizes for `web_fetch` and media URL downloads

Fix merged in pydantic/pydantic-ai PR #7308 on 2026-08-08 — awaiting tagged release

https://github.com/pydantic/pydantic-ai/pull/7308
github_pr Patch Available

Bound HTTP response body sizes for `web_fetch` and media URL downloads

Patch available: pydantic/pydantic-ai v2.32.0 (PR #7141 merged 2026-08-05)

https://github.com/pydantic/pydantic-ai/pull/7141
github_commit

commit e3824a58c828 (pydantic/pydantic-ai)

Fix landed in pydantic/pydantic-ai commit e3824a58c828 — awaiting tagged release

https://github.com/pydantic/pydantic-ai/commit/e3824a58c82864ed26afb2887619834a4eb86cc8
github_commit Patch Available

commit 7a64d049c3f5 (pydantic/pydantic-ai)

Patch available: pydantic/pydantic-ai v2.32.0 (contains commit 7a64d049c3f5)

https://github.com/pydantic/pydantic-ai/commit/7a64d049c3f5271a975cd1d64b2fa876d83ede1d

Vendor Advisories for CVE-2026-107294(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 (38 versions)
  • 1.77.0 up to 1.107.2: fixed in 1.107.2
  • 2.0.0b1 up to 2.24.0: fixed in 2.24.0
—
pydantic-ai-slim1.100.0 ... 1.99.0 (38 versions)
  • 1.77.0 up to 1.107.2: fixed in 1.107.2
  • 2.0.0b1 up to 2.24.0: fixed in 2.24.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 6× 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 20:06 UTCEPSS rescore
  2. 2026-10-09 16:35 UTCEG score recompute
  3. 2026-10-09 15:26 UTCEG score recompute
  4. 2026-10-08 17:25 UTCEG score recompute
  5. 2026-10-08 17:15 UTCEG score recompute
  6. 2026-10-08 17:14 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-107294?
CVE-2026-107294 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 1.77.0 until 1.107.2 and 2.24.0, webfetchtool, the WebFetch local fallback, and remote FileUrl media downloads buffer the complete HTTP response body before enforcing content-size controls. An…
When was CVE-2026-107294 disclosed?
CVE-2026-107294 was first published on October 8, 2026, with the most recent update on October 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-107294 actively exploited?
CVE-2026-107294 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107294?
CVE-2026-107294 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-107294?
A fix for CVE-2026-107294 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-107294 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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