CVE-2026-28389

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-04-08. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

Issue summary: During processing of a crafted CMS EnvelopedData message with KeyAgreeRecipientInfo a NULL pointer dereference can happen.

Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denial of Service.

When a CMS EnvelopedData message that uses KeyAgreeRecipientInfo is processed, the optional parameters field of KeyEncryptionAlgorithmIdentifier is examined without checking for its presence. This results in a NULL pointer dereference if the field is missing.

Applications and services that call CMS_decrypt() on untrusted input (e.g., S/MIME processing or CMS-based protocols) are vulnerable.

The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
55%
KEV
Not listed

Published

April 7, 2026

Last Modified

July 24, 2026

Advisory Details (8)

Auto-updated Jun 11, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

SSA-265688

https://cert-portal.siemens.com/productcert/html/ssa-265688.html
generic

SSA-032379

https://cert-portal.siemens.com/productcert/html/ssa-032379.html
generic
https://openssl-library.org/news/secadv/20260407.txt
github_commit

commit f80f83bc5fd0 (openssl/openssl)

Fix landed in openssl/openssl commit f80f83bc5fd0 — awaiting tagged release

https://github.com/openssl/openssl/commit/f80f83bc5fd036bc47d773e8b15a001e2b4ce686
github_commit

commit c6725634e089 (openssl/openssl)

Fix landed in openssl/openssl commit c6725634e089 — awaiting tagged release

https://github.com/openssl/openssl/commit/c6725634e089eb2b634b10ede33944be7248172a
github_commit

commit 7b5274e81240 (openssl/openssl)

Fix landed in openssl/openssl commit 7b5274e81240 — awaiting tagged release

https://github.com/openssl/openssl/commit/7b5274e812400cacb6f3be4c2df5340923fa807f
github_commit

commit 785cbf7ea3b5 (openssl/openssl)

Fix landed in openssl/openssl commit 785cbf7ea3b5 — awaiting tagged release

https://github.com/openssl/openssl/commit/785cbf7ea3b5a6f5adf0c1ccb92b79d89c35c616
github_commit

commit 16cea4188e0e (openssl/openssl)

Fix landed in openssl/openssl commit 16cea4188e0e — awaiting tagged release

https://github.com/openssl/openssl/commit/16cea4188e0ea567deb4f93f85902247e67384f5

Vendor Advisories for CVE-2026-28389(2)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuopenssl-provider-legacy (3.5.3-1ubuntu3.3) @ questing2026-07-26ubuntu
ubuntuopenssl (1.0.2g-1ubuntu4.20+esm15) @ xenial2026-07-26ubuntu
redhatopenssl-main-3.5.6-0.1.hum12026-04-09redhat

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

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
openssl—3.3.7-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
openssl—3.3.7-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
openssl—3.5.6-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
openssl—3.5.6-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
openssl—3.5.6-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
openssl1.1.1k-1 ... 1.1.1w-0~deb11u1 (22 versions)1.1.1w-0+deb11u7—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
openssl3.0.10-1 ... 3.0.9-1 (20 versions)3.0.19-1~deb12u2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
openssl3.5.1-1 ... 3.5.5-1~deb13u1 (8 versions)3.5.5-1~deb13u2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
openssl3.5.1-1 ... 3.6.1-3 (20 versions)3.6.2-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

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 5× 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 232 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-28389?
CVE-2026-28389 is a high vulnerability published on April 7, 2026. Issue summary: During processing of a crafted CMS EnvelopedData message with KeyAgreeRecipientInfo a NULL pointer dereference can happen. Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denial of…
When was CVE-2026-28389 disclosed?
CVE-2026-28389 was first published in the National Vulnerability Database on April 7, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28389 actively exploited?
CVE-2026-28389 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 45.3% of all scored CVEs.
What is the CVSS score of CVE-2026-28389?
CVE-2026-28389 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-28389?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28389, 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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