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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 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 PROB
0%
EPSS %ILE
29%
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 5× in last 7d / 26× 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 120 total refreshes for this CVE.

  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 19:31 UTCEPSS rescore
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-13 16:47 UTCEPSS rescore
  7. 2026-09-12 15:01 UTCEPSS rescore
  8. 2026-09-11 14:53 UTCEPSS rescore
  9. 2026-09-11 09:37 UTCEPSS rescore
  10. 2026-09-11 04:23 UTCOSV refresh
  11. 2026-09-10 09:34 UTCEPSS rescore
  12. 2026-09-08 22:00 UTCEPSS rescore
  13. 2026-09-07 16:01 UTCEPSS rescore
  14. 2026-09-06 13:47 UTCEPSS rescore
  15. 2026-09-04 05:06 UTCEPSS rescore
  16. 2026-09-02 14:12 UTCEPSS rescore
  17. 2026-09-01 13:54 UTCEPSS rescore
  18. 2026-08-30 19:17 UTCEPSS rescore
  19. 2026-08-30 01:22 UTCEPSS rescore
  20. 2026-08-28 21:41 UTCEPSS rescore
  21. 2026-08-27 14:25 UTCEPSS rescore
  22. 2026-08-26 14:46 UTCEPSS rescore
  23. 2026-08-25 13:49 UTCEPSS rescore
  24. 2026-08-23 16:47 UTCEG score recompute
  25. 2026-08-23 16:47 UTCGHSA enrichment
Show 75 more
  1. 2026-08-23 00:19 UTCEPSS rescore
  2. 2026-08-21 23:49 UTCEPSS rescore
  3. 2026-08-21 21:44 UTCEG score recompute
  4. 2026-08-21 21:44 UTCGHSA enrichment
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-20 18:45 UTCEG score recompute
  7. 2026-08-20 18:45 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-18 13:48 UTCEPSS rescore
  10. 2026-08-17 13:47 UTCEPSS rescore
  11. 2026-08-17 09:47 UTCEG score recompute
  12. 2026-08-17 09:47 UTCGHSA enrichment
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 03:22 UTCEG score recompute
  15. 2026-08-16 03:22 UTCGHSA enrichment
  16. 2026-08-16 02:14 UTCEPSS rescore
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-15 00:07 UTCGHSA enrichment
  19. 2026-08-14 01:55 UTCEG score recompute
  20. 2026-08-14 01:55 UTCGHSA enrichment
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-12 21:17 UTCEG score recompute
  23. 2026-08-12 21:17 UTCGHSA enrichment
  24. 2026-08-12 13:51 UTCEPSS rescore
  25. 2026-08-11 22:54 UTCEG score recompute
  26. 2026-08-11 22:54 UTCGHSA enrichment
  27. 2026-08-11 00:30 UTCEG score recompute
  28. 2026-08-11 00:30 UTCGHSA enrichment
  29. 2026-08-11 00:00 UTCEPSS rescore
  30. 2026-08-09 23:38 UTCEG score recompute
  31. 2026-08-09 23:38 UTCGHSA enrichment
  32. 2026-08-09 13:46 UTCEPSS rescore
  33. 2026-08-09 01:26 UTCEG score recompute
  34. 2026-08-09 01:26 UTCGHSA enrichment
  35. 2026-08-08 16:37 UTCEPSS rescore
  36. 2026-08-07 17:36 UTCEG score recompute
  37. 2026-08-07 17:36 UTCGHSA enrichment
  38. 2026-08-06 19:24 UTCEG score recompute
  39. 2026-08-06 19:24 UTCGHSA enrichment
  40. 2026-08-06 13:47 UTCEPSS rescore
  41. 2026-08-05 21:12 UTCEG score recompute
  42. 2026-08-05 21:12 UTCGHSA enrichment
  43. 2026-08-05 19:17 UTCEPSS rescore
  44. 2026-08-04 15:10 UTCEPSS rescore
  45. 2026-08-04 10:39 UTCEPSS rescore
  46. 2026-08-03 16:50 UTCEG score recompute
  47. 2026-08-03 16:50 UTCGHSA enrichment
  48. 2026-08-03 10:36 UTCEPSS rescore
  49. 2026-08-02 15:36 UTCEG score recompute
  50. 2026-08-02 15:36 UTCGHSA enrichment
  51. 2026-08-02 02:27 UTCEPSS rescore
  52. 2026-08-01 17:24 UTCEG score recompute
  53. 2026-08-01 17:24 UTCGHSA enrichment
  54. 2026-08-01 04:16 UTCEPSS rescore
  55. 2026-07-30 16:28 UTCEPSS rescore
  56. 2026-07-30 01:30 UTCEPSS rescore
  57. 2026-07-29 17:41 UTCEG score recompute
  58. 2026-07-29 17:41 UTCGHSA enrichment
  59. 2026-07-28 15:36 UTCEPSS rescore
  60. 2026-07-27 14:13 UTCEPSS rescore
  61. 2026-07-26 14:54 UTCEPSS rescore
  62. 2026-07-26 14:54 UTCEPSS rescore
  63. 2026-07-26 08:09 UTCEG score recompute
  64. 2026-07-26 08:09 UTCGHSA enrichment
  65. 2026-07-25 14:18 UTCEPSS rescore
  66. 2026-07-23 14:18 UTCEPSS rescore
  67. 2026-07-23 03:17 UTCEG score recompute
  68. 2026-07-22 14:08 UTCEPSS rescore
  69. 2026-06-29 19:56 UTCGHSA enrichment
  70. 2026-06-27 19:53 UTCGHSA enrichment
  71. 2026-06-26 19:20 UTCGHSA enrichment
  72. 2026-06-25 14:14 UTCGHSA enrichment
  73. 2026-06-17 19:58 UTCGHSA enrichment
  74. 2026-06-16 21:03 UTCGHSA enrichment
  75. 2026-06-15 22:47 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 0% probability of exploitation in the next 30 days, which ranks it in the top 70.9% of all scored CVEs.
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

Explore →

Is Your Infrastructure Affected by CVE-2026-46556?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs