CVE-2026-59203

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.4% (32nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated
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).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Pillow is a Python imaging library. From 12.0.0 through 12.2.0, Pillow's EPS parser in PIL/EpsImagePlugin.py accepts a negative byte count in the %%BeginBinary directive, allowing a crafted EPS file to cause Image.open() to seek backwards to the same directive and parse it repeatedly in an infinite loop. This issue is fixed in version 12.3.0.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
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 public PoC (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
0.4%
EPSS %ILE
32nd
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 public PoC (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 15, 2026

Advisory Details (4)

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

Pillow EpsImagePlugin negative %%BeginBinary byte count causes infinite loop denial of service · Advisory · python-pillow/Pillow · GitHub

https://github.com/python-pillow/Pillow/security/advisories/GHSA-pg7v-jwj7-p798
GitHub release Patch Available

12.3.0

Patch available: python-pillow/Pillow 12.3.0

https://github.com/python-pillow/Pillow/releases/tag/12.3.0
GitHub pull request Patch Available

Raise ValueError if EPS BeginBinary bytecount is negative

Patch available: python-pillow/Pillow 12.3.0 (PR #9708 merged 2026-06-22)

https://github.com/python-pillow/Pillow/pull/9708
GitHub commit Patch Available

commit 03992618118b (python-pillow/Pillow)

Patch available: python-pillow/Pillow 12.3.0 (contains commit 03992618118b)

https://github.com/python-pillow/Pillow/commit/03992618118b4a76b6163cd72ab5ecd684133b83

Vendor Advisories for CVE-2026-59203(1)

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

Affected Packages

(2 across 2 ecosystems)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
pillow11.1.0-5 ... 12.2.0-1 (8 versions)
  • every version up to 12.3.0-1: fixed in 12.3.0-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
pillow12.0.0, 12.1.0, 12.1.1, 12.2.0
  • 12.0.0 up to 12.3.0: fixed in 12.3.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 36× 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 143 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 43 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 0.4% · 32nd percentile
  2. 2026-10-13 16:15 UTCEG score recompute
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  4. 2026-10-12 15:52 UTCEG score recompute
  5. 2026-10-11 19:36 UTCEG score recompute
  6. 2026-10-11 16:51 UTCEG score recompute
  7. 2026-10-11 14:14 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  17. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  19. 2026-10-01 13:23 UTCEG score recompute
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  21. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  23. 2026-09-28 09:20 UTCEG score recompute
  24. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  25. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 49th percentile
Show 75 more
  1. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  2. 2026-09-24 09:52 UTCEG score recompute
  3. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  4. 2026-09-23 03:55 UTCEG score recompute
  5. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  6. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  7. 2026-09-18 04:54 UTCEG score recompute
  8. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  9. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  10. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  11. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  12. 2026-09-13 23:27 UTCEG score recompute
  13. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  14. 2026-09-13 07:54 UTCEG score recompute
  15. 2026-09-12 01:45 UTCEG score recompute
  16. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  17. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  18. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  19. 2026-09-08 01:45 UTCEG score recompute
  20. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  21. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  22. 2026-09-05 21:17 UTCEG score recompute
  23. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  24. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  25. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  26. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  27. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  28. 2026-08-30 05:24 UTCEG score recompute
  29. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  30. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  31. 2026-08-27 21:33 UTCEG score recompute
  32. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  33. 2026-08-26 15:00 UTCEG score recompute
  34. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  35. 2026-08-26 01:45 UTCEG score recompute
  36. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  37. 2026-08-24 22:23 UTCEG score recompute
  38. 2026-08-24 09:26 UTCEG score recompute
  39. 2026-08-23 07:31 UTCEG score recompute
  40. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  41. 2026-08-22 05:37 UTCEG score recompute
  42. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  43. 2026-08-21 03:38 UTCEG score recompute
  44. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  45. 2026-08-20 01:27 UTCEG score recompute
  46. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  47. 2026-08-18 23:28 UTCEG score recompute
  48. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  49. 2026-08-17 21:29 UTCEG score recompute
  50. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  51. 2026-08-16 16:32 UTCEG score recompute
  52. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  53. 2026-08-16 03:36 UTCEG score recompute
  54. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  55. 2026-08-15 01:42 UTCEG score recompute
  56. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  57. 2026-08-13 23:49 UTCEG score recompute
  58. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  59. 2026-08-12 21:55 UTCEG score recompute
  60. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  61. 2026-08-11 20:01 UTCEG score recompute
  62. 2026-08-11 07:04 UTCEG score recompute
  63. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  64. 2026-08-09 15:43 UTCEG score recompute
  65. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  66. 2026-08-09 02:46 UTCEG score recompute
  67. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  68. 2026-08-08 00:52 UTCEG score recompute
  69. 2026-08-06 22:59 UTCEG score recompute
  70. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  71. 2026-08-05 20:30 UTCEG score recompute
  72. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  73. 2026-08-04 18:37 UTCEG score recompute
  74. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  75. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.4% · 32nd percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-59203?
CVE-2026-59203 is a high-severity vulnerability; its CVE record was published on July 14, 2026. Pillow is a Python imaging library. From 12.0.0 through 12.2.0, Pillow's EPS parser in PIL/EpsImagePlugin.py accepts a negative byte count in the %%BeginBinary directive, allowing a crafted EPS file to cause Image.open() to seek backwards to the same directive and parse it repeatedly in an infinite…
When was the CVE record for CVE-2026-59203 published?
The CVE record for CVE-2026-59203 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 15, 2026; the record at its source may have been updated since.
Is CVE-2026-59203 actively exploited?
CVE-2026-59203 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59203?
CVE-2026-59203 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-59203?
A fix for CVE-2026-59203 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-59203 are linked in the Vendor Advisories panel on this page.

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