CVE-2026-34531

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 75% 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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Flask-HTTPAuth provides Basic, Digest and Token HTTP authentication for Flask routes. Prior to version 4.8.1, in a situation where the client makes a request to a token protected resource without passing a token, or passing an empty token, Flask-HTTPAuth would invoke the application's token verification callback function with the token argument set to an empty string. If the application had any users in its database with an empty string set as their token, then it could potentially authenticate the client request against any of those users. This issue has been patched in version 4.8.1.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

April 1, 2026

Last Modified

May 28, 2026

Advisory Details (4)

Auto-updated Aug 2, 2026
Patch available. Sources: github_release, github, github_commit.
generic Patch Available

[SECURITY] [DLA 4605-1] python-flask-httpauth security update

https://lists.debian.org/debian-lts-announce/2026/05/msg00049.html
github_commit Patch Available

commit b15ffe9e50e1 (miguelgrinberg/flask-httpauth)

Patch available: miguelgrinberg/flask-httpauth v4.8.1 (contains commit b15ffe9e50e1)

https://github.com/miguelgrinberg/flask-httpauth/commit/b15ffe9e50e110d7174ccd944f642079e1dcf9ee
github Patch Available

Token verification callback invoked when missing or empty token was given by client · Advisory · miguelgrinberg/Flask-HTTPAuth · GitHub

https://github.com/miguelgrinberg/Flask-HTTPAuth/security/advisories/GHSA-p44q-vqpr-4xmg
github_release Patch Available

Release 4.8.1

Patch available: miguelgrinberg/Flask-HTTPAuth v4.8.1

https://github.com/miguelgrinberg/Flask-HTTPAuth/releases/tag/v4.8.1

Vendor Advisories for CVE-2026-34531(1)

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

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
python-flask-httpauth3.2.4-3.13.2.4-3.1+deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
python-flask-httpauth4.5.0-4, 4.8.0-1, 4.8.1-1.1——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
python-flask-httpauth4.8.0-1, 4.8.1-1.1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
python-flask-httpauth4.8.0-14.8.1-1.1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
flask-httpauth1.0.0 ... 4.8.0 (34 versions)4.8.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 37× 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 144 total refreshes for this CVE.

  1. 2026-08-30 19:17 UTCEPSS rescore
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-27 14:25 UTCEPSS rescore
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  14. 2026-08-16 09:28 UTCEG score recompute
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  24. 2026-08-10 03:51 UTCEG score recompute
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  1. 2026-08-09 05:25 UTCEG score recompute
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  9. 2026-08-03 22:48 UTCEG score recompute
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  25. 2026-07-23 03:09 UTCEG score recompute
  26. 2026-07-22 14:08 UTCEPSS rescore
  27. 2026-07-20 17:08 UTCEPSS rescore
  28. 2026-07-19 02:29 UTCEPSS rescore
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  30. 2026-07-17 03:54 UTCOSV refresh
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  50. 2026-06-30 23:22 UTCEPSS rescore
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  73. 2026-06-16 17:52 UTCEPSS rescore
  74. 2026-06-15 17:49 UTCEPSS rescore
  75. 2026-06-14 23:18 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-34531?
CVE-2026-34531 is a medium vulnerability published on April 1, 2026. Flask-HTTPAuth provides Basic, Digest and Token HTTP authentication for Flask routes. Prior to version 4.8.1, in a situation where the client makes a request to a token protected resource without passing a token, or passing an empty token, Flask-HTTPAuth would invoke the application's token…
When was CVE-2026-34531 disclosed?
CVE-2026-34531 was first published in the National Vulnerability Database on April 1, 2026, with the most recent update on May 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34531 actively exploited?
CVE-2026-34531 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.1% of all scored CVEs.
What is the CVSS score of CVE-2026-34531?
CVE-2026-34531 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-34531?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34531, 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

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