CVE-2026-82522

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

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

Score 5.4 from GitHub Security Advisory (severity: MODERATE) published 2026-09-02. The CNA's CVSS baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory

Also known asEUVD-2026-70241 (ENISA EUVD) · GHSA-8q4m-qc33-25q8 (GitHub Security Advisories)Source: ENISA EUVD

5.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

libjxl before 0.12 contains an integer underflow vulnerability in the container box parser that allows remote attackers to inject arbitrary metadata by exploiting 64-bit box size truncation to size_t on 32-bit platforms. Attackers can supply a crafted JPEG XL file causing the decoder to parse attacker-controlled codestream bytes as phantom box headers, enabling injection of arbitrary metadata (Exif, XMP, IPTC, JUMBF) and potential out-of-bounds reads.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

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)
Severity54% × 45%
Impact severity (EG Severity): CVSS 5.4 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.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.2%
EPSS %ILE
13th
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 (5.4): severity, escalated by confirmed exploitation. This CVE's 5.4 is its impact severity (EG Severity), not escalated.

EG Severity
5.4 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS. 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade 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 every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (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

September 2, 2026

Last Modified

November 8, 2026

Advisory Details (4)

Auto-updated Sep 2, 2026
Patch available. Sources: github_release, github_pr, github_commit.
Web page

libjxl < 0.12.0 Container Box Parser Integer Underflow via 32-bit Size Truncation | Advisories | VulnCheck

https://www.vulncheck.com/advisories/libjxl-container-box-parser-integer-underflow-via-32-bit-size-truncation
GitHub commit

commit 22ad80af1454 (libjxl/libjxl)

Fix landed in libjxl/libjxl commit 22ad80af1454 — awaiting tagged release

https://github.com/libjxl/libjxl/commit/22ad80af1454f0444ea34115e49ed40517147d68
GitHub pull request

Several hardening / correctness / security fixes

Fix merged in libjxl/libjxl PR #4885 on 2026-07-01 — awaiting tagged release

https://github.com/libjxl/libjxl/pull/4885
GitHub release Patch Available

v0.12.0

Patch available: libjxl/libjxl v0.12.0

https://github.com/libjxl/libjxl/releases/tag/v0.12.0

Vendor Advisories for CVE-2026-82522(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
jpeg-xl0.10.3-1 ... 0.9.2-9 (57 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
jpeg-xl0.11.1-4 ... 0.11.2-5.1 (13 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
jpeg-xl0.11.1-4 ... 0.11.2-5.1 (13 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 33× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 146 rows 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 46 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:57 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-11-11 16:41 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-11-08 14:19 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub severity MODERATE · GitHub CVSS 5.4
  7. 2026-11-07 19:17 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub severity MODERATE · GitHub CVSS 5.4
  8. 2026-11-07 19:17 UTCEchelonGraph re-scored
  9. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  10. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  12. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  13. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  14. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  15. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  16. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  17. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  18. 2026-10-30 01:25 UTCOSV refresh
  19. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  20. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  22. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  23. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  24. 2026-10-25 13:58 UTCEchelonGraph re-scored
  25. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
Show 75 more
  1. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  2. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  3. 2026-10-22 13:43 UTCEchelonGraph re-scored
  4. 2026-10-22 13:43 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  5. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  6. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  7. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  8. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  9. 2026-10-18 03:08 UTCEchelonGraph re-scored
  10. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  11. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  12. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  13. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  16. 2026-10-12 14:55 UTCEchelonGraph re-scored
  17. 2026-10-11 19:19 UTCEchelonGraph re-scored
  18. 2026-10-11 16:36 UTCEchelonGraph re-scored
  19. 2026-10-11 13:54 UTCEchelonGraph re-scored
  20. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  21. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-10-10 09:21 UTCEchelonGraph re-scored
  23. 2026-10-10 09:21 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  24. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  25. 2026-10-09 07:08 UTCEchelonGraph re-scored
  26. 2026-10-09 07:08 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  27. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  28. 2026-10-08 04:55 UTCEchelonGraph re-scored
  29. 2026-10-08 04:55 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  30. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  31. 2026-10-07 02:43 UTCEchelonGraph re-scored
  32. 2026-10-07 02:43 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  33. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  34. 2026-10-06 00:31 UTCEchelonGraph re-scored
  35. 2026-10-06 00:31 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  36. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  37. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  38. 2026-10-04 22:03 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  39. 2026-10-03 19:52 UTCEchelonGraph re-scored
  40. 2026-10-03 19:52 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  41. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  42. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  43. 2026-10-02 17:40 UTCEchelonGraph re-scored
  44. 2026-10-02 17:40 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  45. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  46. 2026-10-01 15:27 UTCEchelonGraph re-scored
  47. 2026-10-01 15:27 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  48. 2026-09-30 19:19 UTCEchelonGraph re-scored
  49. 2026-09-30 19:19 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  50. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  51. 2026-09-29 11:51 UTCEchelonGraph re-scored
  52. 2026-09-29 11:51 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  53. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  54. 2026-09-28 09:15 UTCEchelonGraph re-scored
  55. 2026-09-28 09:15 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  56. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  57. 2026-09-27 07:04 UTCEchelonGraph re-scored
  58. 2026-09-27 07:04 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  59. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  60. 2026-09-26 04:52 UTCEchelonGraph re-scored
  61. 2026-09-26 04:52 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  62. 2026-09-24 19:39 UTCEchelonGraph re-scored
  63. 2026-09-24 19:39 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  64. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  65. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  66. 2026-09-23 17:24 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  67. 2026-09-23 13:49 UTCEchelonGraph re-scored
  68. 2026-09-23 13:48 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  69. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  70. 2026-09-22 11:37 UTCEchelonGraph re-scored
  71. 2026-09-22 11:37 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  72. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  73. 2026-09-21 09:25 UTCEchelonGraph re-scored
  74. 2026-09-21 09:25 UTCGHSA enrichmentGHSA-8q4m-qc33-25q8 · GitHub CVSS 5.4
  75. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 14th percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-82522?
CVE-2026-82522 is a medium-severity vulnerability; its CVE record was published on September 2, 2026. libjxl before 0.12 contains an integer underflow vulnerability in the container box parser that allows remote attackers to inject arbitrary metadata by exploiting 64-bit box size truncation to size_t on 32-bit platforms. Attackers can supply a crafted JPEG XL file causing the decoder to parse…
When was CVE-2026-82522 made public?
CVE-2026-82522 was made public on July 1, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on September 2, 2026. EchelonGraph's copy of the record carries a last-modified date of November 8, 2026; the record at its source may have been updated since.
Is CVE-2026-82522 actively exploited?
CVE-2026-82522 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82522?
CVE-2026-82522 has a CVSS base score of 5.4 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-82522?
A fix for CVE-2026-82522 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-82522 are linked in the Vendor Advisories panel on this page.

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