CVE-2026-30922

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 92% 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
Elevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the pyasn1 library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested SEQUENCE (0x30) or SET (0x31) tags with "Indefinite Length" (0x80) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a RecursionError or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (MAX_OID_ARC_CONTINUATION_OCTETS) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
43.6%
KEV
Not listed

Published

March 18, 2026

Last Modified

May 1, 2026

Advisory Details (4)

Auto-updated May 1, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic Patch Available

[SECURITY] [DLA 4557-1] pyasn1 security update

https://lists.debian.org/debian-lts-announce/2026/05/msg00001.html
generic

oss-security - [CVE-2026-30922] Denial of Service in pyasn1 via Unbounded Recursion

http://www.openwall.com/lists/oss-security/2026/03/20/4
github Patch Available🟡 PoC Available

Denial of Service in pyasn1 via Unbounded Recursion · Advisory · pyasn1/pyasn1 · GitHub

https://github.com/pyasn1/pyasn1/security/advisories/GHSA-jr27-m4p2-rc6r
generic

Merge commit from fork · pyasn1/pyasn1@25ad481 · GitHub

https://github.com/pyasn1/pyasn1/commit/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0

Vendor Advisories for CVE-2026-30922(20)

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

Patch Availability(29)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatautomation-controller-0:4.7.12-1.el9ap2026-06-09redhat
redhatautomation-controller-0:4.6.29-2.el9ap2026-06-09redhat
redhatfence-agents-0:4.10.0-86.el9_6.172026-06-04redhat
redhatfence-agents-0:4.10.0-43.el9_2.222026-06-03redhat
redhatfence-agents-0:4.10.0-62.el9_4.252026-06-03redhat
redhatfence-agents-0:4.2.1-65.el8_4.282026-06-01redhat
redhatresource-agents-0:4.9.0-40.el8_8.192026-06-01redhat
redhatresource-agents-0:4.1.1-90.el8_4.252026-06-01redhat
redhatfence-agents-0:4.2.1-89.el8_6.222026-06-01redhat
redhatresource-agents-0:4.9.0-16.el8_6.222026-06-01redhat
redhatfence-agents-0:4.2.1-112.el8_8.172026-05-26redhat
redhatrhoai/odh-kserve-storage-initializer-rhel9:17782634072026-05-20redhat
redhatquay/quay-rhel9:17792040862026-05-19redhat
redhatfence-agents-0:4.10.0-110.el9_8.22026-05-19redhat
redhatfence-agents-0:4.16.0-21.el10_2.12026-05-19redhat
redhatrhelai3/bootc-rocm-rhel9:17786661242026-05-14redhat
redhatfence-agents-0:4.16.0-5.el10_0.92026-05-13redhat
redhatrhaiis/vllm-rocm-rhel9:17782445312026-05-11redhat
redhatfence-agents-0:4.10.0-98.el9_7.132026-05-06redhat
redhatfence-agents-0:4.16.0-13.el10_1.42026-05-06redhat
redhatresource-agents-0:4.9.0-54.el8_10.332026-05-06redhat
redhatstf/smart-gateway-rhel9-operator:17774361502026-05-06redhat
redhatansible-automation-platform-26/lightspeed-rhel9:17773872422026-05-04redhat
redhatansible-automation-platform-25/platform-resource-runner-rhel8:17774022642026-05-04redhat
redhatpython3.12-pyasn1-0:0.6.3-1.el9ap2026-05-04redhat
redhatfence-agents-0:4.2.1-129.el8_10.252026-04-30redhat
redhatrhoai/odh-kserve-storage-initializer-rhel9:17763431112026-04-23redhat
redhatrhtas/model-transparency-rhel9:17758154072026-04-16redhat
redhatquay/quay-rhel8:17751691552026-04-07redhat

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
pyasn10.0.10a ... 0.6.2 (40 versions)0.6.3—

Additional Vendor Advisories

(10)

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 8× in last 7d / 41× 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 104 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-30922?
CVE-2026-30922 is a high vulnerability published on March 18, 2026. pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the pyasn1 library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested…
When was CVE-2026-30922 disclosed?
CVE-2026-30922 was first published in the National Vulnerability Database on March 18, 2026, with the most recent update on May 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-30922 actively exploited?
CVE-2026-30922 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 43.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-30922?
CVE-2026-30922 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-30922?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-30922, 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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