CVE-2026-44307

HIGHNVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 53% of all CVEs by exploit prediction. 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, nvd
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 8.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Mako is a template library written in Python. Prior to 1.3.12, on Windows, a URI using backslash traversal (e.g. \..\..\ secret.txt) bypasses the directory traversal check in Template.__init__ and the posixpath-based normalization in TemplateLookup.get_template(), allowing reads of files outside the configured template directory. This vulnerability is fixed in 1.3.12.

CVSS v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
54
EG Risk 54/100

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
Severity87% × 45%
Exploitation1% × 40%
Automatability100% × 15%
EPSS PROB
0.9%
EPSS %ILE
58th
KEV
Not listed

Published

May 12, 2026

Last Modified

May 13, 2026

Advisory Details (4)

Auto-updated May 12, 2026
Patch available. Sources: github.
githubMentions a patch (unverified)

Path traversal via backslash URI on Windows in TemplateLookup · Advisory · sqlalchemy/mako · GitHub

https://github.com/sqlalchemy/mako/security/advisories/GHSA-2h4p-vjrc-8xpq
generic

Release 1.3.12 · sqlalchemy/mako · GitHub

https://github.com/sqlalchemy/mako/releases/tag/rel_1_3_12
generic

backslash handling issue in template URI normalization on Windows · Issue #435 · sqlalchemy/mako · GitHub

https://github.com/sqlalchemy/mako/issues/435
generic

Fix path traversal via backslash URI on Windows in TemplateLookup · sqlalchemy/mako@72e10c5 · GitHub

https://github.com/sqlalchemy/mako/commit/72e10c573ca0fbcbddd4455abca8ce92a61780d7

Vendor Advisories for CVE-2026-44307(1)

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

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
mako0.1.0 ... 1.3.9 (78 versions)
  • every version up to 1.3.12: fixed in 1.3.12
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 24× 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.

Showing the most recent 100 of 164 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
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  1. 2026-09-08 22:00 UTCEPSS rescore
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  68. 2026-07-16 14:19 UTCOSV refresh
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  75. 2026-07-09 19:10 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-44307?
CVE-2026-44307 is a high vulnerability published on May 12, 2026. Mako is a template library written in Python. Prior to 1.3.12, on Windows, a URI using backslash traversal (e.g. \..\..\ secret.txt) bypasses the directory traversal check in Template.init and the posixpath-based normalization in TemplateLookup.get_template(), allowing reads of files outside the…
When was CVE-2026-44307 disclosed?
CVE-2026-44307 was first published on May 12, 2026, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44307 actively exploited?
CVE-2026-44307 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% probability of exploitation in the next 30 days (58th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44307?
CVE-2026-44307 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-44307?
A fix for CVE-2026-44307 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-44307 are linked in the Vendor Advisories panel on this page.

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