CVE-2026-49284

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 87% 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, secondary
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

SimpleSAMLphp versions before 1.18.6 contain an information disclosure vulnerability. Prior to 2.4.7 and 2.5.2, SimpleSAMLphp's SAML SP ACS path does not enforce the IdP selected for an SP-initiated login when unsigned Response/InResponseTo is combined with a signed assertion lacking SubjectConfirmationData/InResponseTo, allowing a response issued by one trusted IdP to be bound to SP state created for another IdP and bypass flows that route users to a specific IdP, including deployments that set enable_unsolicited to false. This issue is fixed in versions 2.4.7 and 2.5.2.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100

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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

Published

July 2, 2026

Last Modified

July 30, 2026

Advisory Details (3)

Auto-updated Jul 17, 2026
Patch available. Sources: github, github_release.
github_release Patch Available

SimpleSAMLphp v2.5.2

Patch available: simplesamlphp/simplesamlphp v2.5.2

https://github.com/simplesamlphp/simplesamlphp/releases/tag/v2.5.2
github_release Patch Available

SimpleSAMLphp v2.4.7

Patch available: simplesamlphp/simplesamlphp v2.4.7

https://github.com/simplesamlphp/simplesamlphp/releases/tag/v2.4.7
githubMentions a patch (unverified)

SimpleSAMLphp SP accepts a response from an unexpected IdP when unsigned `Response/InResponseTo` is combined with a signed assertion lacking `SubjectConfirmationData/InResponseTo` · Advisory · simplesamlphp/simplesamlphp · GitHub

https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-q8r6-xj3f-wrrm

Vendor Advisories for CVE-2026-49284(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
simplesamlphp1.19.0-1 ... 2.4.8-1 (13 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
simplesamlphp1.19.7-1 ... 2.5.3.1-1 (10 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
simplesamlphp1.10.0-1 ... 2.3.11-2 (73 versions)
  • every version up to 2.4.8-1: fixed in 2.4.8-1
—
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
simplesamlphp/simplesamlphp1.16.0 ... v2.4.6 (134 versions)
  • 2.5.0 up to 2.5.2: fixed in 2.5.2
  • every version up to 2.4.7: fixed in 2.4.7
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× 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 108 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-08 17:12 UTCEPSS rescore
  4. 2026-10-07 23:48 UTCEPSS rescore
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  10. 2026-09-30 15:03 UTCEPSS rescore
  11. 2026-09-28 13:51 UTCEPSS rescore
  12. 2026-09-27 13:48 UTCEPSS rescore
  13. 2026-09-26 15:59 UTCEPSS rescore
  14. 2026-09-26 00:27 UTCEPSS rescore
  15. 2026-09-23 17:53 UTCEPSS rescore
  16. 2026-09-23 06:38 UTCEG score recompute
  17. 2026-09-20 20:16 UTCEPSS rescore
  18. 2026-09-18 19:28 UTCEPSS rescore
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  20. 2026-09-16 14:08 UTCEPSS rescore
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  22. 2026-09-14 00:15 UTCEG score recompute
  23. 2026-09-13 16:47 UTCEPSS rescore
  24. 2026-09-13 08:59 UTCEG score recompute
  25. 2026-09-12 14:15 UTCEG score recompute
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  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 09:35 UTCEPSS rescore
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 14:19 UTCEG score recompute
  6. 2026-09-06 13:47 UTCEPSS rescore
  7. 2026-09-05 23:51 UTCEG score recompute
  8. 2026-09-04 05:06 UTCEPSS rescore
  9. 2026-09-02 14:12 UTCEPSS rescore
  10. 2026-09-01 13:54 UTCEPSS rescore
  11. 2026-09-01 04:40 UTCEPSS rescore
  12. 2026-08-30 22:45 UTCEG score recompute
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 11:22 UTCEG score recompute
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-28 21:41 UTCEPSS rescore
  17. 2026-08-27 22:14 UTCEG score recompute
  18. 2026-08-27 14:25 UTCEPSS rescore
  19. 2026-08-26 14:46 UTCEPSS rescore
  20. 2026-08-25 13:49 UTCEPSS rescore
  21. 2026-08-24 20:55 UTCEG score recompute
  22. 2026-08-23 06:46 UTCEG score recompute
  23. 2026-08-23 00:19 UTCEPSS rescore
  24. 2026-08-22 06:26 UTCEG score recompute
  25. 2026-08-21 23:49 UTCEPSS rescore
  26. 2026-08-21 04:27 UTCEG score recompute
  27. 2026-08-20 22:55 UTCEPSS rescore
  28. 2026-08-20 04:01 UTCEG score recompute
  29. 2026-08-19 17:04 UTCEPSS rescore
  30. 2026-08-18 23:09 UTCEG score recompute
  31. 2026-08-18 13:48 UTCEPSS rescore
  32. 2026-08-17 22:50 UTCEG score recompute
  33. 2026-08-17 13:47 UTCEPSS rescore
  34. 2026-08-16 18:04 UTCEG score recompute
  35. 2026-08-16 14:56 UTCEPSS rescore
  36. 2026-08-16 06:40 UTCEG score recompute
  37. 2026-08-16 02:14 UTCEPSS rescore
  38. 2026-08-15 07:57 UTCEG score recompute
  39. 2026-08-15 01:30 UTCEPSS rescore
  40. 2026-08-14 07:39 UTCEG score recompute
  41. 2026-08-13 22:00 UTCEPSS rescore
  42. 2026-08-12 21:33 UTCEG score recompute
  43. 2026-08-12 13:51 UTCEPSS rescore
  44. 2026-08-11 22:48 UTCEG score recompute
  45. 2026-08-11 11:19 UTCEG score recompute
  46. 2026-08-11 00:00 UTCEPSS rescore
  47. 2026-08-09 13:51 UTCEG score recompute
  48. 2026-08-09 13:46 UTCEPSS rescore
  49. 2026-08-09 02:30 UTCEG score recompute
  50. 2026-08-08 16:37 UTCEPSS rescore
  51. 2026-08-06 17:39 UTCEG score recompute
  52. 2026-08-06 13:47 UTCEPSS rescore
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  54. 2026-08-05 19:17 UTCEPSS rescore
  55. 2026-08-04 19:58 UTCEG score recompute
  56. 2026-08-04 15:10 UTCEPSS rescore
  57. 2026-08-03 20:15 UTCEG score recompute
  58. 2026-08-03 10:36 UTCEPSS rescore
  59. 2026-08-02 10:07 UTCEG score recompute
  60. 2026-08-02 02:27 UTCEPSS rescore
  61. 2026-08-01 11:23 UTCEG score recompute
  62. 2026-08-01 04:16 UTCEPSS rescore
  63. 2026-07-31 01:10 UTCEG score recompute
  64. 2026-07-30 16:28 UTCEPSS rescore
  65. 2026-07-30 12:37 UTCEG score recompute
  66. 2026-07-30 01:30 UTCEPSS rescore
  67. 2026-07-29 02:10 UTCEG score recompute
  68. 2026-07-28 15:37 UTCEPSS rescore
  69. 2026-07-27 15:52 UTCEG score recompute
  70. 2026-07-26 16:35 UTCEG score recompute
  71. 2026-07-26 05:10 UTCEG score recompute
  72. 2026-07-25 14:18 UTCEPSS rescore
  73. 2026-07-24 14:18 UTCEPSS rescore
  74. 2026-07-23 14:18 UTCEPSS rescore
  75. 2026-07-23 03:18 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-49284?
CVE-2026-49284 is a high vulnerability published on July 2, 2026. SimpleSAMLphp versions before 1.18.6 contain an information disclosure vulnerability. Prior to 2.4.7 and 2.5.2, SimpleSAMLphp's SAML SP ACS path does not enforce the IdP selected for an SP-initiated login when unsigned Response/InResponseTo is combined with a signed assertion lacking…
When was CVE-2026-49284 disclosed?
CVE-2026-49284 was first published on July 2, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49284 actively exploited?
CVE-2026-49284 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-49284?
CVE-2026-49284 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-49284?
A fix for CVE-2026-49284 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-49284 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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