CVE-2026-23490

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 90% 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 0.6.2, 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)
EPSS
48.2%
KEV
Not listed

Published

January 16, 2026

Last Modified

July 15, 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
redhatrhoai/odh-training-cuda128-torch29-py312-rhel9:17791233342026-05-20redhat
redhatpython-pyasn1-0:0.5.1-4.el92026-05-20redhat
redhatrhelai3/bootc-rocm-rhel9:17786661242026-05-14redhat
redhatstf/smart-gateway-rhel9-operator:17774361502026-05-06redhat
redhatansible-automation-platform-25/platform-resource-runner-rhel8:17774022642026-05-04redhat
redhatansible-automation-platform-26/ee-supported-rhel9:17773914472026-05-04redhat
redhatpython3.12-pyasn1-0:0.6.3-1.el9ap2026-05-04redhat
redhatrhceph/rhceph-8-rhel9:17740028672026-03-24redhat
redhatrhui5/rhua-rhel9:17736701372026-03-18redhat
redhatpython-pyasn1-0:0.3.7-6.el8_2.12026-03-10redhat
redhatpython-pyasn1-0:0.3.7-6.el8_8.12026-03-10redhat
redhatpython-pyasn1-0:0.4.8-6.el9_6.12026-03-10redhat
redhatpython-pyasn1-0:0.1.9-7.el7_9.22026-03-10redhat
redhatpython-pyasn1-0:0.6.2-1.el10_0.12026-03-10redhat
redhatpython-pyasn1-0:0.4.8-6.el9_0.12026-03-10redhat
redhatpython-pyasn1-0:0.4.8-6.el9_4.12026-03-10redhat
redhatpython-pyasn1-0:0.4.8-6.el9_2.12026-03-10redhat
redhatpython-pyasn1-0:0.3.7-6.el8_6.12026-03-10redhat
redhatpython-pyasn1-0:0.3.7-6.el8_10.12026-03-10redhat
redhatpython-pyasn1-0:0.3.7-6.el8_4.12026-03-10redhat
redhatautomation-controller-0:4.7.9-1.el9ap2026-03-06redhat
redhatautomation-controller-0:4.6.26-1.el9ap2026-03-06redhat
redhatpython-pyasn1-0:0.6.2-1.el10_12026-02-25redhat
redhatpython-pyasn1-0:0.4.8-7.el9_72026-02-25redhat
redhatresource-agents-0:4.1.1-61.el7_9.232026-02-16redhat
redhatresource-agents-0:4.1.1-90.el8_4.232026-02-16redhat
redhatresource-agents-0:4.9.0-40.el8_8.162026-02-10redhat
redhatfence-agents-0:4.2.1-89.el8_6.212026-02-10redhat

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

(1 across 1 ecosystem)
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

(16)

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 11× in last 7d / 51× 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.

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

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 July 15, 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 48.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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