CVE-2026-46556

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-05-21. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Elevated
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

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

FlaskBB is a Forum Software written in Python using the micro framework Flask. Prior to version 2.2.1, a Server-Side Request Forgery (SSRF) vulnerability in get_image_info() allows any authenticated user to force the server to send HTTP requests to arbitrary internal endpoints, including cloud metadata services. This is a blind SSRF with confirmed internal port scanning and internal API triggering capabilities. Version 2.2.1 patches the issue.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
11.1%
KEV
Not listed

Published

May 21, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Jul 21, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

SSRF in get_image_info() via unrestricted avatar URL (CWE-918) · Advisory · flaskbb/flaskbb · GitHub

https://github.com/flaskbb/flaskbb/security/advisories/GHSA-xq32-9g7q-7297
github_commit Patch Available

commit e87e585f54bb (flaskbb/flaskbb)

Patch available: flaskbb/flaskbb v2.2.1 (contains commit e87e585f54bb)

https://github.com/flaskbb/flaskbb/commit/e87e585f54bbe36694e91d52ee9b2d2e65dd4ab5

Vendor Advisories for CVE-2026-46556(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
pipflaskbb—ghsa

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

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
flaskbb2.0.0, 2.0.0.dev0, 2.0.1, 2.0.2, 2.2.0——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 7× 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. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 03:17 UTCEG score recompute
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-06-29 19:56 UTCGHSA enrichment
  5. 2026-06-27 19:53 UTCGHSA enrichment
  6. 2026-06-26 19:20 UTCGHSA enrichment
  7. 2026-06-25 14:14 UTCGHSA enrichment
  8. 2026-06-17 19:58 UTCGHSA enrichment
  9. 2026-06-16 21:03 UTCGHSA enrichment
  10. 2026-06-15 22:47 UTCGHSA enrichment
  11. 2026-06-14 23:57 UTCGHSA enrichment
  12. 2026-06-14 23:18 UTCEPSS rescore
  13. 2026-06-14 01:45 UTCGHSA enrichment
  14. 2026-06-13 03:29 UTCGHSA enrichment
  15. 2026-06-12 23:12 UTCEPSS rescore
  16. 2026-06-12 05:07 UTCGHSA enrichment
  17. 2026-06-11 06:55 UTCGHSA enrichment
  18. 2026-06-10 08:44 UTCGHSA enrichment
  19. 2026-06-09 10:32 UTCGHSA enrichment
  20. 2026-06-08 12:20 UTCGHSA enrichment
  21. 2026-06-07 14:08 UTCGHSA enrichment
  22. 2026-06-06 15:51 UTCGHSA enrichment
  23. 2026-06-05 17:38 UTCGHSA enrichment
  24. 2026-06-04 19:26 UTCGHSA enrichment
  25. 2026-06-03 21:14 UTCGHSA enrichment
Show 5 more
  1. 2026-06-02 23:02 UTCGHSA enrichment
  2. 2026-06-02 00:50 UTCGHSA enrichment
  3. 2026-06-01 02:38 UTCGHSA enrichment
  4. 2026-05-24 06:10 UTCEG score recompute
  5. 2026-05-24 06:10 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-46556?
CVE-2026-46556 is a medium vulnerability published on May 21, 2026. FlaskBB is a Forum Software written in Python using the micro framework Flask. Prior to version 2.2.1, a Server-Side Request Forgery (SSRF) vulnerability in getimageinfo() allows any authenticated user to force the server to send HTTP requests to arbitrary internal endpoints, including cloud…
When was CVE-2026-46556 disclosed?
CVE-2026-46556 was first published in the National Vulnerability Database on May 21, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46556 actively exploited?
CVE-2026-46556 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46556?
CVE-2026-46556 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-46556?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46556, 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-2026-46556

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