CVE-2026-23490

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7%, top 49% 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
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 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.

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
50%
KEV
Not listed

Published

January 16, 2026

Last Modified

August 27, 2026

Advisory Details (10)

Auto-updated Jul 3, 2026
🔬 Proof of concept available. Patch available. Sources: redhat, github_commit, github_release, github.
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:17446
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:14020
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:13553
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:13545
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:13512
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:13508
generic Patch Available

[SECURITY] [DLA 4463-1] pyasn1 security update

https://lists.debian.org/debian-lts-announce/2026/02/msg00002.html
github Patch Available🟡 PoC Available

DoS vulnerability in decoder · Advisory · pyasn1/pyasn1 · GitHub

https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq
github_release Patch Available

Release 0.6.2

Patch available: pyasn1/pyasn1 v0.6.2

https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2
github_commit Patch Available

commit 3908f144229e (pyasn1/pyasn1)

Patch available: pyasn1/pyasn1 v0.6.2 (contains commit 3908f144229e)

https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970

Vendor Advisories for CVE-2026-23490(20)

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

Patch Availability(28)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpython-pyasn1-0:0.4.6-4.el8ost2026-08-13redhat
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17836154322026-07-21redhat
redhatrhmtc/openshift-migration-hook-runner-rhel8:17839317222026-07-20redhat
redhatrhoso-operators/ee-openstack-ansible-ee-rhel9:17823875492026-07-15redhat
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17824716972026-07-09redhat
redhatrhaiis/vllm-rocm-rhel9:17823530932026-06-25redhat
redhatpython-pyasn1-0:0.4.6-5.el8ost2026-06-22redhat
redhatrhoai/odh-kserve-storage-initializer-rhel9:17800691272026-06-10redhat
redhatansible-automation-platform-26/lightspeed-chatbot-rhel9:17801027322026-06-09redhat
redhatrhtas/segment-reporting-rhel9:17805601172026-06-08redhat
redhatrhtas/model-transparency-rhel9:17809148862026-06-08redhat
redhatpython-pyasn1-0:0.5.1-4.el92026-05-20redhat
redhatrhoai/odh-training-cuda128-torch29-py312-rhel9:17791233342026-05-20redhat
redhatrhelai3/bootc-rocm-rhel9:17786661242026-05-14redhat
redhatstf/smart-gateway-rhel9-operator:17774361502026-05-06redhat
redhatpython3.12-pyasn1-0:0.6.3-1.el9ap2026-05-04redhat
redhatansible-automation-platform-25/platform-resource-runner-rhel8:17774022642026-05-04redhat
redhatansible-automation-platform-26/ee-supported-rhel9:17773914472026-05-04redhat
redhatrhceph/rhceph-8-rhel9:17740028672026-03-24redhat
redhatrhui5/rhua-rhel9:17736701372026-03-18redhat
redhatpython-pyasn1-0:0.3.7-6.el8_10.12026-03-10redhat
redhatpython-pyasn1-0:0.4.8-6.el9_0.12026-03-10redhat
redhatpython-pyasn1-0:0.3.7-6.el8_4.12026-03-10redhat
redhatpython-pyasn1-0:0.1.9-7.el7_9.22026-03-10redhat
redhatpython-pyasn1-0:0.4.8-6.el9_4.12026-03-10redhat
redhatpython-pyasn1-0:0.3.7-6.el8_6.12026-03-10redhat
redhatpython-pyasn1-0:0.3.7-6.el8_2.12026-03-10redhat
redhatpython-pyasn1-0:0.6.2-1.el10_0.12026-03-10redhat

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
pyasn10.4.8-10.4.8-1+deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
pyasn10.4.8-30.4.8-3+deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
pyasn10.6.1-10.6.1-1+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
pyasn10.6.1-1, 0.6.2-1~bpo13+10.6.2-1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
pyasn10.6.10.6.2—

Weakness Classification(1)

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

Additional Vendor Advisories

(15)

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 / 77× 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 188 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-23490?
CVE-2026-23490 is a high vulnerability published on January 16, 2026. pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.
When was CVE-2026-23490 disclosed?
CVE-2026-23490 was first published in the National Vulnerability Database on January 16, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23490 actively exploited?
CVE-2026-23490 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 49.5% of all scored CVEs.
What is the CVSS score of CVE-2026-23490?
CVE-2026-23490 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-23490?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23490, 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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