CVE-2026-30922

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.8%, top 46% 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: cna:github_m, epss
Trending — 3 sources updated this weekElevated
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: Elevated riskExposed: 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)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
54%
KEV
Not listed

Published

March 18, 2026

Last Modified

August 25, 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
redhatrhmtc/openshift-migration-hook-runner-rhel8:17839317222026-07-20redhat
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17824716972026-07-09redhat
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-0:4.1.1-90.el8_4.252026-06-01redhat
redhatresource-agents-0:4.9.0-40.el8_8.192026-06-01redhat
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
redhatfence-agents-0:4.10.0-110.el9_8.22026-05-19redhat
redhatquay/quay-rhel9:17792040862026-05-19redhat
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
redhatresource-agents-0:4.9.0-54.el8_10.332026-05-06redhat
redhatstf/smart-gateway-rhel9-operator:17774361502026-05-06redhat
redhatfence-agents-0:4.16.0-13.el10_1.42026-05-06redhat
redhatpython3.12-pyasn1-0:0.6.3-1.el9ap2026-05-04redhat
redhatansible-automation-platform-26/lightspeed-rhel9:17773872422026-05-04redhat
redhatansible-automation-platform-25/platform-resource-runner-rhel8:17774022642026-05-04redhat
redhatfence-agents-0:4.2.1-129.el8_10.252026-04-30redhat
redhatrhoai/odh-kserve-storage-initializer-rhel9:17763431112026-04-23redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
pyasn10.4.8-1, 0.4.8-1+deb11u10.4.8-1+deb11u2—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
pyasn10.4.8-3, 0.4.8-3+deb12u10.4.8-3+deb12u2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
pyasn10.6.1-1, 0.6.1-1+deb13u10.6.1-1+deb13u2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
pyasn10.6.1-1, 0.6.2-1, 0.6.2-1~bpo13+10.6.3-1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
pyasn10.0.10a ... 0.6.2 (40 versions)0.6.3—

Weakness Classification(2)

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

Additional Vendor Advisories

(11)

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 17× in last 7d / 80× 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 209 total refreshes for this CVE.

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

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 August 25, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 46.1% of all scored CVEs.
What is the CVSS score of CVE-2026-30922?
CVE-2026-30922 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
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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