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 45% 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
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
EPSS PROB
0.9%
EPSS %ILE
59th
KEV
Not listed

Published

March 18, 2026

Last Modified

September 17, 2026

Advisory Details (4)

Auto-updated May 1, 2026
🔬 Proof of concept available. Patch available. Sources: github.
genericMentions a patch (unverified)

[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
githubMentions a patch (unverified)🟡 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 / EcosystemFix (by version range) / PatchReleasedSource
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17881858992026-09-08redhat
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-0:4.10.0-62.el9_4.252026-06-03redhat
redhatfence-agents-0:4.10.0-43.el9_2.222026-06-03redhat
redhatresource-agents-0:4.9.0-16.el8_6.222026-06-01redhat
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
redhatfence-agents-0:4.2.1-65.el8_4.282026-06-01redhat
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-0:4.16.0-21.el10_2.12026-05-19redhat
redhatfence-agents-0:4.10.0-110.el9_8.22026-05-19redhat
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
redhatresource-agents-0:4.9.0-54.el8_10.332026-05-06redhat
redhatfence-agents-0:4.16.0-13.el10_1.42026-05-06redhat
redhatfence-agents-0:4.10.0-98.el9_7.132026-05-06redhat
redhatstf/smart-gateway-rhel9-operator:17774361502026-05-06redhat
redhatansible-automation-platform-25/platform-resource-runner-rhel8:17774022642026-05-04redhat
redhatpython3.12-pyasn1-0:0.6.3-1.el9ap2026-05-04redhat
redhatansible-automation-platform-26/lightspeed-rhel9:17773872422026-05-04redhat
redhatfence-agents-0:4.2.1-129.el8_10.252026-04-30redhat

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 rangeFix by version rangeDependents
pyasn10.4.8-1, 0.4.8-1+deb11u1
  • every version up to 0.4.8-1+deb11u2: fixed in 0.4.8-1+deb11u2
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
pyasn10.4.8-3, 0.4.8-3+deb12u1
  • every version up to 0.4.8-3+deb12u2: fixed in 0.4.8-3+deb12u2
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
pyasn10.6.1-1, 0.6.1-1+deb13u1
  • every version up to 0.6.1-1+deb13u2: fixed in 0.6.1-1+deb13u2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
pyasn10.6.1-1, 0.6.2-1, 0.6.2-1~bpo13+1
  • every version up to 0.6.3-1: fixed in 0.6.3-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
pyasn10.0.10a ... 0.6.2 (40 versions)
  • every version up to 0.6.3: fixed in 0.6.3
—

Weakness Classification(2)

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

Additional Vendor Advisories

(12)

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 / 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 265 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

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 on March 18, 2026, with the most recent update on September 17, 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 0.9% probability of exploitation in the next 30 days (59th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-30922?
CVE-2026-30922 has a CVSS base score of 7.5 (the CNA's own assessment, by github_m; NVD's own analysis pending).
How do I remediate CVE-2026-30922?
A fix for CVE-2026-30922 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-30922 are linked in the Vendor Advisories panel on this page.

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