CVE-2026-96760

CRITICALPre-NVD 9.89.1
EchelonGraph scoreMEDIUM confidence

“▼” beside the score: it is lower than the CVSS score beside it.

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-10-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.7.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Trending — Patch released this week

Also known asEUVD-2026-88465 (ENISA EUVD) · GHSA-6m87-8wg6-hh8w (GitHub Security Advisories) · GHSA-6v38-4h7w-rj9h (GitHub Security Advisories)Source: ENISA EUVD

9.1EG
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: 0.4%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key.

CVSS v3
9.8
EG Score
9.1CRITICALmedium confidence
EG Risk
56
EG Risk 56/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 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 total (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
0.4%
EPSS %ILE
37th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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 total (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)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (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

September 28, 2026

Last Modified

October 1, 2026

Advisory Details (3)

Auto-updated Oct 28, 2026
Patch available. Sources: cert.
CERT

VU#762428 - Authlib library contains a signature‑verification bypass vulnerability

https://www.kb.cert.org/vuls/id/762428
CERT

VU#762428 - Authlib library contains a signature‑verification bypass vulnerability

https://kb.cert.org/vuls/id/762428
Web page

GitHub - authlib/authlib: The ultimate Python library in building OAuth, OpenID Connect clients and servers. JWS, JWE, JWK, JWA, JWT included. · GitHub

https://github.com/authlib/authlib

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatsatellite/foreman-mcp-server-rhel9:17932722762026-10-29redhat
redhatsatellite/foreman-mcp-server-rhel9:17932722792026-10-29redhat
redhatansible-automation-platform-26/lightspeed-chatbot-rhel9:17919787982026-10-21redhat
redhatansible-automation-platform-27/lightspeed-chatbot-rhel9:17912506202026-10-08redhat
pipauthlib @ 1.9.0 (fixes <= 1.8.0)—ghsa

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
python-authlib1.2.0-1 ... 1.7.2-2 (27 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
python-authlib1.6.0-1 ... 1.7.2-2 (13 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
python-authlib1.6.0-1 ... 1.7.2-2 (12 versions)
  • every version on: no fix on record
—

Weakness Classification(4)

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

Additional Vendor Advisories

(2)

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 25× in last 7d / 165× 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 188 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 88 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 04:29 UTCEG score recompute
  2. 2026-11-02 04:29 UTCVendor advisory
  3. 2026-11-02 04:29 UTCGHSA enrichmentGHSA-6v38-4h7w-rj9h · GitHub severity CRITICAL · GitHub CVSS 9.1
  4. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  5. 2026-11-01 07:37 UTCEG score recompute▼ 0.70
  6. 2026-11-01 07:37 UTCGHSA enrichmentGHSA-6v38-4h7w-rj9h · GitHub severity CRITICAL · GitHub CVSS 9.1
  7. 2026-11-01 02:45 UTCEG score recompute
  8. 2026-11-01 02:45 UTCVendor advisory
  9. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  10. 2026-10-31 01:00 UTCEG score recompute
  11. 2026-10-31 01:00 UTCVendor advisory
  12. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  13. 2026-10-29 23:16 UTCEG score recompute
  14. 2026-10-29 23:16 UTCVendor advisory
  15. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  16. 2026-10-28 21:32 UTCEG score recompute
  17. 2026-10-28 21:32 UTCVendor advisory
  18. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  19. 2026-10-28 06:41 UTCEG score recompute
  20. 2026-10-28 06:41 UTCVendor advisory
  21. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-10-27 04:58 UTCEG score recompute
  23. 2026-10-27 04:58 UTCVendor advisory
  24. 2026-10-27 04:58 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
Show 75 more
  1. 2026-10-25 23:07 UTCEG score recompute
  2. 2026-10-25 23:07 UTCVendor advisory
  3. 2026-10-25 23:07 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-10-25 13:48 UTCEG score recompute
  6. 2026-10-24 21:23 UTCEG score recompute
  7. 2026-10-24 21:23 UTCVendor advisory
  8. 2026-10-24 21:23 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  10. 2026-10-23 19:39 UTCEG score recompute
  11. 2026-10-23 19:39 UTCVendor advisory
  12. 2026-10-23 19:39 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  13. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  14. 2026-10-22 17:55 UTCEG score recompute
  15. 2026-10-22 17:55 UTCVendor advisory
  16. 2026-10-22 17:54 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  18. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  19. 2026-10-21 16:10 UTCEG score recompute
  20. 2026-10-21 16:10 UTCVendor advisory
  21. 2026-10-21 16:10 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  23. 2026-10-20 14:23 UTCEG score recompute
  24. 2026-10-20 14:23 UTCVendor advisory
  25. 2026-10-20 14:23 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  26. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  27. 2026-10-19 12:37 UTCEG score recompute
  28. 2026-10-19 12:37 UTCVendor advisory
  29. 2026-10-19 12:37 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  30. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  31. 2026-10-18 10:51 UTCVendor advisory
  32. 2026-10-18 10:51 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  33. 2026-10-18 02:57 UTCEG score recompute
  34. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  35. 2026-10-17 09:07 UTCEG score recompute
  36. 2026-10-17 09:07 UTCVendor advisory
  37. 2026-10-17 09:07 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  38. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  39. 2026-10-16 07:23 UTCEG score recompute
  40. 2026-10-16 07:23 UTCVendor advisory
  41. 2026-10-16 07:23 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  42. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  43. 2026-10-15 05:37 UTCEG score recompute
  44. 2026-10-15 05:37 UTCVendor advisory
  45. 2026-10-15 05:37 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  46. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  47. 2026-10-14 01:17 UTCEG score recompute
  48. 2026-10-14 01:17 UTCVendor advisory
  49. 2026-10-14 01:17 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  50. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  51. 2026-10-12 21:29 UTCEG score recompute
  52. 2026-10-12 21:29 UTCVendor advisory
  53. 2026-10-12 21:29 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  54. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  55. 2026-10-12 14:40 UTCEG score recompute
  56. 2026-10-12 00:45 UTCVendor advisory
  57. 2026-10-12 00:45 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  58. 2026-10-11 20:15 UTCVendor advisory
  59. 2026-10-11 20:15 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  60. 2026-10-11 19:11 UTCEG score recompute
  61. 2026-10-11 16:27 UTCEG score recompute
  62. 2026-10-11 15:46 UTCEG score recompute
  63. 2026-10-11 15:46 UTCVendor advisory
  64. 2026-10-11 15:46 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  65. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  66. 2026-10-11 13:39 UTCEG score recompute
  67. 2026-10-11 11:23 UTCEG score recompute
  68. 2026-10-11 11:23 UTCVendor advisory
  69. 2026-10-11 11:23 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  70. 2026-10-11 06:59 UTCVendor advisory
  71. 2026-10-11 06:59 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  72. 2026-10-11 02:36 UTCVendor advisory
  73. 2026-10-11 02:36 UTCGHSA enrichmentGHSA-6m87-8wg6-hh8w · GitHub severity CRITICAL · GitHub CVSS 9.8
  74. 2026-10-10 21:48 UTCEG score recompute
  75. 2026-10-10 21:48 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-96760?
CVE-2026-96760 is a critical-severity vulnerability; its CVE record was published on September 28, 2026. Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key.
When was the CVE record for CVE-2026-96760 published?
The CVE record for CVE-2026-96760 was published on September 28, 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 October 1, 2026; the record at its source may have been updated since.
Is CVE-2026-96760 actively exploited?
CVE-2026-96760 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-96760?
CVE-2026-96760 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending). EchelonGraph synthesises CISA-ADP (Vulnrichment) CVSS v3.1 + FIRST EPSS + GHSA into a combined EG score of 9.1 (CRITICAL).
How do I remediate CVE-2026-96760?
A fix for CVE-2026-96760 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-96760 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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