CVE-2023-23934

LOWNVD 2.62.6—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 2.6 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 60% 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
2.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 2.6Exploit: None knownExposed: 0

A fix is available — apply it.

Werkzeug is a comprehensive WSGI web application library. Browsers may allow "nameless" cookies that look like =value instead of key=value. A vulnerable browser may allow a compromised application on an adjacent subdomain to exploit this to set a cookie like =__Host-test=bad for another subdomain. Werkzeug prior to 2.2.3 will parse the cookie =__Host-test=bad as __Host-test=bad`. If a Werkzeug application is running next to a vulnerable or malicious subdomain which sets such a cookie using a vulnerable browser, the Werkzeug application will see the bad cookie value but the valid cookie key. The issue is fixed in Werkzeug 2.2.3.

CVSS v3
2.6
EG Score
2.6(medium)
EG Risk
12(Track)
EG Risk 12/100SSVC: Track

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
Severity26% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
41%
KEV
Not listed

Published

February 14, 2023

Last Modified

November 21, 2024

References (10)

Vendor Advisories for CVE-2023-23934(2)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython-werkzeug-doc (0.16.1+dfsg1-2ubuntu0.1) @ focal2026-05-25ubuntu
ubuntupython-werkzeug-doc (2.2.2-2ubuntu0.1) @ lunar2026-05-25ubuntu
redhatoath-toolkit-0:2.6.12-1.el9cp2025-06-26redhat
redhatoath-toolkit-0:2.6.12-1.el8cp2025-05-07redhat
redhatpython-werkzeug-0:2.0.1-5.el9ost2023-02-28redhat

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

(6 across 6 ecosystems)
Debian:10(1)
PackageVulnerable rangeFixed inDependents
python-werkzeug0.14.1+dfsg1-4, 0.14.1+dfsg1-4+deb10u10.14.1+dfsg1-4+deb10u2—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
python-werkzeug1.0.1+dfsg1-21.0.1+dfsg1-2+deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
python-werkzeug—2.2.2-3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
python-werkzeug—2.2.2-3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
python-werkzeug—2.2.2-3—
PyPI(1)
PackageVulnerable rangeFixed inDependents
werkzeug0.1 ... 2.2.2 (80 versions)2.2.3—

Weakness Classification(1)

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

Additional Vendor Advisories

(4)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 29× 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 161 total refreshes for this CVE.

  1. 2026-09-07 15:59 UTCEPSS rescore
  2. 2026-09-06 13:45 UTCEPSS rescore
  3. 2026-09-05 15:25 UTCEPSS rescore
  4. 2026-09-04 15:29 UTCOSV refresh
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  22. 2026-08-18 02:52 UTCOSV refresh
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  28. 2026-07-23 02:19 UTCEG score recompute
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  30. 2026-07-22 14:06 UTCEPSS rescore
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  41. 2026-07-16 06:19 UTCOSV refresh
  42. 2026-07-15 16:56 UTCEPSS rescore
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  67. 2026-06-28 05:22 UTCOSV refresh
  68. 2026-06-28 04:54 UTCEPSS rescore
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  75. 2026-06-23 21:31 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-23934?
CVE-2023-23934 is a low vulnerability published on February 14, 2023. Werkzeug is a comprehensive WSGI web application library. Browsers may allow "nameless" cookies that look like =value instead of key=value. A vulnerable browser may allow a compromised application on an adjacent subdomain to exploit this to set a cookie like =Host-test=bad for another subdomain.…
When was CVE-2023-23934 disclosed?
CVE-2023-23934 was first published in the National Vulnerability Database on February 14, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-23934 actively exploited?
CVE-2023-23934 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 58.6% of all scored CVEs.
What is the CVSS score of CVE-2023-23934?
CVE-2023-23934 has a CVSS v3 base score of 2.6 (NVD).
How do I remediate CVE-2023-23934?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-23934, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-23934

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