CVE-2026-48526

HIGHPre-NVD 7.47.4
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (35th 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 — 3 sources updated this weekElevated
7.4EG
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).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.4Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer public key as the secret key for HMAC algorithm. This vulnerability is fixed in 2.13.0.

CVSS v3
7.4
EG Score
7.4HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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)
Severity74% × 45%
Impact severity (EG Severity): CVSS 7.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (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
35th
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 (7.4): severity, escalated by confirmed exploitation. This CVE's 7.4 is its impact severity (EG Severity), not escalated.

EG Severity
7.4 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

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

Exploitation public PoC (CISA Vulnrichment) · Automatable no (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (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

May 28, 2026

Last Modified

September 10, 2026

Advisory Details (1)

Auto-updated May 29, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Public-key JWK accepted as HMAC secret enables forged HS256 tokens when mixed families are allowed · Advisory · jpadilla/pyjwt · GitHub

https://github.com/jpadilla/pyjwt/security/advisories/GHSA-xgmm-8j9v-c9wx

Patch Availability(29)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhelai3/bootc-rocm-rhel9:17906144472026-10-05redhat
redhatrhelai3/disk-image-cuda-rhel9:17909574172026-10-05redhat
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17902609542026-09-30redhat
redhatrhaii/vllm-spyre-rhel9:17900761412026-09-23redhat
redhatrhaii/vllm-rocm-rhel9:17901096202026-09-23redhat
redhatrhaii/vllm-cuda-rhel9:17900901312026-09-23redhat
redhatrhaii/vllm-cpu-rhel9:17900757932026-09-23redhat
redhatquay/quay-rhel8:17885938432026-09-22redhat
redhatrhaii/vllm-cuda-rhel9:17896811262026-09-21redhat
redhatrhaii/vllm-spyre-rhel9:17896812012026-09-21redhat
redhatrhaii/vllm-rocm-rhel9:17896811262026-09-21redhat
redhatrhaii/vllm-cpu-rhel9:17896811282026-09-21redhat
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17870735932026-08-27redhat
redhatrhoai/odh-latency-predictor-training-rhel9:17865522502026-08-26redhat
redhatrhtas/model-transparency-rhel9:17854204252026-08-05redhat
redhatansible-automation-platform-27/gateway-rhel9:17854359702026-08-04redhat
redhatpython-pyjwt-0:2.13.0-1.el9pc2026-08-04redhat
redhatautomation-controller-0:4.6.31-1.el9ap2026-08-04redhat
redhatpython3.12-pyjwt-0:2.13.0-1.el9pc2026-08-04redhat
redhatautomation-controller-0:4.7.15-2.el9ap2026-08-04redhat
redhatquay/quay-rhel9:17849872732026-07-29redhat
redhatmta/mta-solution-server-rhel9:17841098832026-07-21redhat
redhatrhoai/odh-llama-stack-core-rhel9:17837015982026-07-21redhat
redhatquay/quay-rhel8:17843519662026-07-21redhat
redhatansible-automation-platform-tech-preview/metrics-service-rhel9:17839691392026-07-20redhat
redhatansible-automation-platform-25/lightspeed-rhel8:17840465112026-07-20redhat
redhatansible-automation-platform-27/metrics-service-rhel9:17839205422026-07-20redhat
redhatrhtas/segment-reporting-rhel9:17840165542026-07-16redhat
redhatquay/quay-rhel9:17839558462026-07-16redhat

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
pyjwt1.7.1-2 ... 2.7.0-1 (16 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
pyjwt2.10.1-1 ... 2.7.0-1 (13 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
pyjwt2.10.1-2 ... 2.15.1-1 (10 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
pyjwt2.10.1-2, 2.10.1-3, 2.10.1-4, 2.11.0-2, 2.12.1-1
  • every version up to 2.13.0-1: fixed in 2.13.0-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
pyjwt0.1.1 ... 2.9.0 (54 versions)
  • every version up to 2.13.0: fixed in 2.13.0
—

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 10× in last 7d / 34× 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 273 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 173 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  3. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-10-18 03:34 UTCEG score recompute
  6. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  7. 2026-10-17 12:20 UTCEG score recompute
  8. 2026-10-17 12:20 UTCVendor advisory
  9. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  10. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  12. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  13. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  14. 2026-10-12 16:00 UTCEG score recompute
  15. 2026-10-11 19:44 UTCEG score recompute
  16. 2026-10-11 16:58 UTCEG score recompute
  17. 2026-10-11 14:22 UTCEG score recompute
  18. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  19. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  20. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  22. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  23. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  24. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  25. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 34th percentile
Show 75 more
  1. 2026-10-03 15:19 UTCOSV refresh
  2. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  3. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  4. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  5. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  6. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  7. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  8. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  10. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  11. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  12. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  13. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-09-14 06:47 UTCEG score recompute
  15. 2026-09-14 06:47 UTCVendor advisory
  16. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  17. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-09-10 13:38 UTCEG score recompute
  19. 2026-09-10 13:38 UTCVendor advisory
  20. 2026-09-10 12:26 UTCEG score recompute
  21. 2026-09-10 12:26 UTCVendor advisory
  22. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  23. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  25. 2026-09-07 12:38 UTCEG score recompute
  26. 2026-09-07 12:38 UTCVendor advisory
  27. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  28. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  29. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  30. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  31. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  32. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  33. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  34. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  35. 2026-08-28 16:46 UTCEG score recompute
  36. 2026-08-28 16:46 UTCVendor advisory
  37. 2026-08-28 15:59 UTCEG score recompute
  38. 2026-08-28 15:59 UTCVendor advisory
  39. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  40. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  41. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  42. 2026-08-25 04:44 UTCEG score recompute
  43. 2026-08-25 04:44 UTCVendor advisory
  44. 2026-08-24 12:24 UTCEG score recompute
  45. 2026-08-24 12:24 UTCVendor advisory
  46. 2026-08-23 14:30 UTCEG score recompute
  47. 2026-08-23 14:30 UTCVendor advisory
  48. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  49. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  50. 2026-08-21 15:26 UTCVendor advisory
  51. 2026-08-21 00:41 UTCEG score recompute
  52. 2026-08-21 00:41 UTCVendor advisory
  53. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  54. 2026-08-20 10:46 UTCEG score recompute
  55. 2026-08-20 10:46 UTCVendor advisory
  56. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  57. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  58. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  59. 2026-08-17 12:25 UTCEG score recompute
  60. 2026-08-17 12:25 UTCVendor advisory
  61. 2026-08-17 12:12 UTCEG score recompute
  62. 2026-08-17 12:12 UTCVendor advisory
  63. 2026-08-17 08:08 UTCVendor advisory
  64. 2026-08-16 15:21 UTCEG score recompute
  65. 2026-08-16 15:21 UTCVendor advisory
  66. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  67. 2026-08-16 02:35 UTCEG score recompute
  68. 2026-08-16 02:35 UTCVendor advisory
  69. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  70. 2026-08-15 02:52 UTCEG score recompute
  71. 2026-08-15 02:52 UTCVendor advisory
  72. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  73. 2026-08-14 13:47 UTCVendor advisory
  74. 2026-08-14 01:01 UTCEG score recompute
  75. 2026-08-14 01:01 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-48526?
CVE-2026-48526 is a high-severity vulnerability; its CVE record was published on May 28, 2026. PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer public key as the…
When was the CVE record for CVE-2026-48526 published?
The CVE record for CVE-2026-48526 was published on May 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 September 10, 2026; the record at its source may have been updated since.
Is CVE-2026-48526 actively exploited?
CVE-2026-48526 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-48526?
CVE-2026-48526 has a CVSS base score of 7.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-48526?
A fix for CVE-2026-48526 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-48526 are linked in the Vendor Advisories panel on this page.

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