CVE-2026-59886

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (48th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — Patch released this week
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the univ.Real type converted its mantissa, base, and exponent value to a Python float using exact big-integer exponentiation. A BER, CER, or DER encoded REAL value only a few bytes long can carry a very large exponent, causing float conversion through prettyPrint(), str(), comparison, arithmetic, int(), or an explicit float() call to consume excessive CPU and memory and hang applications that decode untrusted ASN.1 data and then print, log, or compare decoded objects. This issue is fixed in version 0.6.4.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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 (value × EchelonGraph’s weight)
Severity75% × 45%
The EG Score, 7.5 of 10.
Exploitation0.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
48th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 14, 2026

Last Modified

July 21, 2026

Advisory Details (3)

Auto-updated Jul 15, 2026
Patch available. Sources: github_commit, github_release, github.
GitHub advisoryMentions a patch (unverified)

Uncontrolled resource consumption when converting decoded REAL values · Advisory · pyasn1/pyasn1 · GitHub

https://github.com/pyasn1/pyasn1/security/advisories/GHSA-hm4w-wwcw-mr6r
GitHub release Patch Available

Release 0.6.4

Patch available: pyasn1/pyasn1 v0.6.4

https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4
GitHub commit Patch Available

commit e60c691cb91a (pyasn1/pyasn1)

Patch available: pyasn1/pyasn1 v0.6.4 (contains commit e60c691cb91a)

https://github.com/pyasn1/pyasn1/commit/e60c691cb91addb8fcefa2f537e85ede6fb1e886

Vendor Advisories for CVE-2026-59886(20)

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

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatquay/quay-rhel9:17912655902026-10-12redhat
redhatstf/prometheus-webhook-snmp-rhel9:17900068592026-10-07redhat
redhatsatellite/iop-advisor-backend-rhel9:17896664982026-10-01redhat
redhatrhoai/odh-mlflow-rhel9:17896536062026-09-30redhat
redhatquay/quay-rhel8:17885938432026-09-22redhat
redhatquay/quay-rhel9:17895637532026-09-21redhat
redhatrhui5/rhua-rhel9:17888805812026-09-09redhat
redhatrhelai3/disk-image-cuda-rhel9:17882903142026-09-01redhat
redhatrhelai3/bootc-gcp-cuda-rhel9:17882739772026-09-01redhat
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17870735932026-08-27redhat
redhatpython-pyasn1-0:0.3.7-6.el8_8.22026-08-25redhat
redhatresource-agents-0:4.1.1-61.el7_9.242026-08-25redhat
redhatpython-pyasn1-0:0.4.8-7.el9_8.12026-08-25redhat
redhatpython-pyasn1-0:0.4.8-6.el9_4.22026-08-25redhat
redhatpython-pyasn1-0:0.6.2-1.el10_2.12026-08-25redhat
redhatrhaiis/model-opt-cuda-rhel9:17876011592026-08-25redhat
redhatpython-pyasn1-0:0.4.8-6.el9_6.22026-08-25redhat
redhatpython-pyasn1-0:0.3.7-6.el8_4.22026-08-25redhat
redhatpython-pyasn1-0:0.3.7-6.el8_6.22026-08-25redhat
redhatpython-pyasn1-0:0.3.7-6.el8_10.22026-08-25redhat
redhatpython-pyasn1-0:0.4.8-6.el9_2.22026-08-25redhat
redhatpython-pyasn1-0:0.1.9-7.el7_9.32026-08-25redhat
redhatpython-pyasn1-0:0.6.2-1.el10_0.22026-08-25redhat
redhatrhtas/segment-reporting-rhel9:17873055252026-08-25redhat
redhatansible-automation-platform-27/lightspeed-rhel9:17872175312026-08-24redhat
redhatautomation-controller-0:4.7.16-1.el9ap2026-08-24redhat
redhatautomation-controller-0:4.6.32-1.el9ap2026-08-24redhat
redhatfence-agents-0:4.2.1-89.el8_6.262026-08-24redhat
redhatfence-agents-0:4.10.0-43.el9_2.252026-08-24redhat
redhatfence-agents-0:4.2.1-112.el8_8.212026-08-24redhat

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 ... 0.6.4-1 (14 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
pyasn10.4.8-3, 0.4.8-3+deb12u1, 0.4.8-3+deb12u2
  • every version up to 0.4.8-3+deb12u3: fixed in 0.4.8-3+deb12u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
pyasn10.6.1-1, 0.6.1-1+deb13u1, 0.6.1-1+deb13u2
  • every version up to 0.6.1-1+deb13u3: fixed in 0.6.1-1+deb13u3
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
pyasn10.6.1-1, 0.6.2-1, 0.6.2-1~bpo13+1, 0.6.3-1, 0.6.4-1~bpo13+1
  • every version up to 0.6.4-1: fixed in 0.6.4-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
pyasn10.0.10a ... 0.6.3 (41 versions)
  • every version up to 0.6.4: fixed in 0.6.4
—

Weakness Classification(2)

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

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 13× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 220 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 120 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  2. 2026-10-13 15:48 UTCEG score recompute
  3. 2026-10-13 15:48 UTCVendor advisory
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  5. 2026-10-12 15:52 UTCEG score recompute
  6. 2026-10-11 19:36 UTCEG score recompute
  7. 2026-10-11 16:51 UTCEG score recompute
  8. 2026-10-11 14:13 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  18. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  20. 2026-10-01 13:23 UTCEG score recompute
  21. 2026-10-01 13:23 UTCVendor advisory
  22. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  23. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  24. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  25. 2026-09-28 09:20 UTCEG score recompute
Show 75 more
  1. 2026-09-28 09:20 UTCVendor advisory
  2. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  3. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  4. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  5. 2026-09-24 09:51 UTCVendor advisory
  6. 2026-09-23 03:55 UTCEG score recompute
  7. 2026-09-23 03:55 UTCVendor advisory
  8. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  9. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  10. 2026-09-18 04:53 UTCEG score recompute
  11. 2026-09-18 04:53 UTCVendor advisory
  12. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  13. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  14. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  15. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  16. 2026-09-14 11:15 UTCVendor advisory
  17. 2026-09-13 23:27 UTCEG score recompute
  18. 2026-09-13 23:27 UTCVendor advisory
  19. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  20. 2026-09-13 07:53 UTCEG score recompute
  21. 2026-09-13 07:53 UTCVendor advisory
  22. 2026-09-12 13:33 UTCVendor advisory
  23. 2026-09-12 01:45 UTCEG score recompute
  24. 2026-09-12 01:45 UTCVendor advisory
  25. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  26. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  27. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  28. 2026-09-08 01:44 UTCEG score recompute
  29. 2026-09-08 01:44 UTCVendor advisory
  30. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  31. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  32. 2026-09-06 13:46 UTCVendor advisory
  33. 2026-09-05 21:17 UTCEG score recompute
  34. 2026-09-05 21:17 UTCVendor advisory
  35. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  36. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  37. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  38. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  39. 2026-08-31 05:38 UTCEG score recompute
  40. 2026-08-31 05:38 UTCVendor advisory
  41. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  42. 2026-08-30 17:07 UTCVendor advisory
  43. 2026-08-30 05:19 UTCEG score recompute
  44. 2026-08-30 05:19 UTCVendor advisory
  45. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  46. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  47. 2026-08-28 02:01 UTCEG score recompute
  48. 2026-08-28 02:01 UTCVendor advisory
  49. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  50. 2026-08-27 13:50 UTCVendor advisory
  51. 2026-08-27 01:38 UTCEG score recompute
  52. 2026-08-27 01:38 UTCVendor advisory
  53. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  54. 2026-08-26 13:48 UTCVendor advisory
  55. 2026-08-26 01:44 UTCEG score recompute
  56. 2026-08-26 01:44 UTCVendor advisory
  57. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  58. 2026-08-25 10:29 UTCVendor advisory
  59. 2026-08-24 22:40 UTCEG score recompute
  60. 2026-08-24 22:40 UTCVendor advisory
  61. 2026-08-24 10:52 UTCEG score recompute
  62. 2026-08-24 10:52 UTCVendor advisory
  63. 2026-08-23 23:04 UTCVendor advisory
  64. 2026-08-23 11:09 UTCEG score recompute
  65. 2026-08-23 11:09 UTCVendor advisory
  66. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  67. 2026-08-22 23:21 UTCVendor advisory
  68. 2026-08-22 11:33 UTCEG score recompute
  69. 2026-08-22 11:33 UTCVendor advisory
  70. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  71. 2026-08-21 23:45 UTCVendor advisory
  72. 2026-08-21 11:57 UTCVendor advisory
  73. 2026-08-21 00:09 UTCEG score recompute
  74. 2026-08-21 00:09 UTCVendor advisory
  75. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 26th percentile

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

Frequently asked(5)

What is CVE-2026-59886?
CVE-2026-59886 is a high-severity vulnerability; its CVE record was published on July 14, 2026. pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the univ.Real type converted its mantissa, base, and exponent value to a Python float using exact big-integer exponentiation. A BER, CER, or DER encoded REAL value only a few bytes long can carry a very large exponent, causing float…
When was the CVE record for CVE-2026-59886 published?
The CVE record for CVE-2026-59886 was published on July 14, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 21, 2026; the record at its source may have been updated since.
Is CVE-2026-59886 actively exploited?
CVE-2026-59886 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (48th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59886?
CVE-2026-59886 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-59886?
A fix for CVE-2026-59886 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-59886 are linked in the Vendor Advisories panel on this page.

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