CVE-2026-42310

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.2% (6th 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
5.5EG
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: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Pillow is a Python imaging library. From version 4.2.0 to before version 12.2.0, an attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive. This issue has been patched in version 12.2.0.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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)
Severity55% × 45%
The EG Score, 5.5 of 10.
Exploitation0.2% × 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
6th
KEV
Not listed

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.

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

May 9, 2026

Last Modified

July 24, 2026

Advisory Details (4)

Auto-updated May 9, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

PDF Parsing Trailer Infinite Loop (DoS) · Advisory · python-pillow/Pillow · GitHub

https://github.com/python-pillow/Pillow/security/advisories/GHSA-r73j-pqj5-w3x7
Web page

Release 12.2.0 · python-pillow/Pillow · GitHub

https://github.com/python-pillow/Pillow/releases/tag/12.2.0
Web page

Raise an error if the trailer chain loops back on itself by hugovk · Pull Request #9519 · python-pillow/Pillow · GitHub

https://github.com/python-pillow/Pillow/pull/9519
Web page

Raise an error if the trailer chain loops back on itself (#9519) · python-pillow/Pillow@3bf614e · GitHub

https://github.com/python-pillow/Pillow/commit/3bf614e4b8615d0ce1d5039efaf6db447fe7c468

Vendor Advisories for CVE-2026-42310(4)

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

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3-pil.imagetk (11.3.0-1ubuntu1.3) @ questing2026-08-23ubuntu
redhatrhaii/vllm-spyre-rhel9:17871518402026-08-20redhat
redhatrhaiis/model-opt-cuda-rhel9:17782445592026-05-11redhat
redhatrhaiis/vllm-rocm-rhel9:17782445312026-05-11redhat
redhatrhaiis/vllm-cuda-rhel9:17782746662026-05-11redhat

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
pillow10.0.0-1 ... 9.5.0-1 (38 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
pillow10.0.0-1 ... 9.5.0-1 (23 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
pillow11.1.0-5, 11.1.0-5+deb13u1, 11.1.0-5+deb13u2
  • every version up to 11.1.0-5+deb13u3: fixed in 11.1.0-5+deb13u3
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
pillow11.1.0-5 ... 12.1.1-2 (7 versions)
  • every version up to 12.2.0-1: fixed in 12.2.0-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
pillow10.0.0 ... 9.5.0 (51 versions)
  • 4.2.0 up to 12.2.0: fixed in 12.2.0
—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 10× in last 7d / 27× 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 99 of 206 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 107 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  4. 2026-10-12 16:07 UTCEG score recompute
  5. 2026-10-11 19:49 UTCEG score recompute
  6. 2026-10-11 17:03 UTCEG score recompute
  7. 2026-10-11 14:29 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-09-30 07:28 UTCOSV refresh
  20. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  22. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
Show 74 more
  1. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-09-11 12:53 UTCOSV refresh
  6. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-08-23 18:50 UTCEG score recompute
  21. 2026-08-23 18:50 UTCVendor advisory
  22. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  27. 2026-08-17 11:27 UTCEG score recompute
  28. 2026-08-17 11:27 UTCVendor advisory
  29. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-08-16 04:31 UTCEG score recompute
  31. 2026-08-16 04:31 UTCVendor advisory
  32. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  33. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  34. 2026-08-15 01:09 UTCVendor advisory
  35. 2026-08-14 03:05 UTCEG score recompute
  36. 2026-08-14 03:05 UTCVendor advisory
  37. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  38. 2026-08-12 21:24 UTCEG score recompute
  39. 2026-08-12 21:24 UTCVendor advisory
  40. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  41. 2026-08-11 23:18 UTCEG score recompute
  42. 2026-08-11 23:18 UTCVendor advisory
  43. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  44. 2026-08-11 01:14 UTCEG score recompute
  45. 2026-08-11 01:14 UTCVendor advisory
  46. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  47. 2026-08-10 00:25 UTCEG score recompute
  48. 2026-08-10 00:25 UTCVendor advisory
  49. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  50. 2026-08-09 02:21 UTCEG score recompute
  51. 2026-08-09 02:21 UTCVendor advisory
  52. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  53. 2026-08-07 18:15 UTCVendor advisory
  54. 2026-08-06 20:10 UTCEG score recompute
  55. 2026-08-06 20:10 UTCVendor advisory
  56. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  57. 2026-08-05 22:05 UTCEG score recompute
  58. 2026-08-05 22:05 UTCVendor advisory
  59. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  60. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  61. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  62. 2026-08-03 22:47 UTCEG score recompute
  63. 2026-08-03 22:47 UTCVendor advisory
  64. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  65. 2026-08-03 00:43 UTCVendor advisory
  66. 2026-08-02 02:38 UTCEG score recompute
  67. 2026-08-02 02:38 UTCVendor advisory
  68. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  69. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  70. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  71. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  72. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  73. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  74. 2026-07-26 08:26 UTCEG score recompute

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

Frequently asked(5)

What is CVE-2026-42310?
CVE-2026-42310 is a medium-severity vulnerability; its CVE record was published on May 9, 2026. Pillow is a Python imaging library. From version 4.2.0 to before version 12.2.0, an attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive. This issue has been patched in version 12.2.0.
When was the CVE record for CVE-2026-42310 published?
The CVE record for CVE-2026-42310 was published on May 9, 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 24, 2026; the record at its source may have been updated since.
Is CVE-2026-42310 actively exploited?
CVE-2026-42310 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42310?
CVE-2026-42310 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-42310?
A fix for CVE-2026-42310 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-42310 are linked in the Vendor Advisories panel on this page.

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