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CVE-2024-50379

INDEX BUILT · 2026-09-20

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Apache Tomcat: RCE due to TOCTOU issue in JSP compilation

CVE-2024-503794 of 4 sources documented this
27

rank 27 = 22 + 0 + 0 + 5 + 0

rank@v1 · scheduled

Someone is already using it

CISA KEV catalog · public proof-of-concept · FIRST EPSS

EPSS 0.44312  ·  without this subject the record ranks 5

What it costs you if it fires

NVD CVSS base score, then the CNA's own

no CVSS held by anyone  ·  without this subject the record ranks 27

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

no persisting rise in 365 days  ·  without this subject the record ranks 27

How much of the world it touches

NVD CPE configurations

3 products in the CPE ranges  ·  without this subject the record ranks 22

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 27

Hindsight · the state

0.44312EPSSNOT IN KEVas of 2026-09-20
Severitynot scored
Harmnot stated
Exploitationpublic proof-of-conceptreceipt
Defensefix version namedreceipt
Movementrisenreceipt
PLATEAU10Minimal movement since 2026-06-15, 27 days at 0.44, as of 2026-07-12. arc-rules@v1

Foresight · where to check next

Microsoft WindowsVMware ESXiLinuxApple tvOSMicrosoft 365CVE-2015-324650379

This record is one instance of CWE-367, time-of-check time-of-use (toctou) race condition. The index holds 833 prior instances of this class, 6 KEV-listed. The nearest of its KEV-listed records are drawn beside this. taxonomy@v1

Full pattern panel

Prior records in this weakness class. Each is its own record, dated and receipted.
Color is a claim, not decoration:the hostile worldthe defenseno signal

Running Apache Tomcat? Check your version

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Harm, if it fires from the vector and the weakness

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ReachNo CVSS vector in held sources, so no reach or impact can be stated.
Weakness classCWE-367 Time-of-check Time-of-use (TOCTOU) Race Conditionreceipt
Published consequencesCWE-367: Integrity, Other: Alter Execution Logic, Unexpected State; Integrity, Other: Modify Application Data, Modify Files or Directories, Modify Memory, Other; Integrity, Other: Other…[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

The fix, and how long it's been waiting.

Fixed in8.5.0receipt
Patch available sinceNo dated patch-availability record in held sources. The index holds reference URLs without dates and only the current revision of the CVE record, so the day a fix first existed cannot be derived. Only the versions it landed in.

Exploit Status & Known PoCs a ladder, not a score

Current rung: Proof-of-concept published · 14 public repositories, 2024-12-18.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 14 public repositories2024-12-18receipt
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

Exploit probability0.44312 · top 1% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned byapachereceipt
Recorded changes85 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productApache Software Foundation Apache Tomcatreceipt
Published rangesapache tomcat >= 9.0.0 < 9.0.98; apache tomcat >= 10.1.0 < 10.1.34; apache tomcat >= 11.0.0 < 11.0.2receipt
Fixed in8.5.0receipt

A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.

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What it is stated by the CNA

Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability during JSP compilation in Apache Tomcat permits an RCE on case insensitive file systems when the default servlet is enabled for write (non-default configuration). This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.1, from 10.1.0-M1 through 10.1.33, from 9.0.0.M1 through 9.0.97. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.2, 10.1.34 or 9.0.98, which fixes the issue. receipt

NVD's analysis a second authority

weakness
CWE-367
affected versions
apache tomcat >= 9.0.0 < 9.0.98; apache tomcat >= 10.1.0 < 10.1.34; apache tomcat >= 11.0.0 < 11.0.2
also scored by
9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

check it yourself lists.apache.org receipt

Dated events

2025-03-17EPSS moved 0.00 to 0.842026-06-15EPSS moved 0.85 to 0.42

Movement the material steps

18 Dec 20240.00043
17 Mar 20250.83709 · crossed 0.10 and 0.50 · scoring model v2025.03.14
9 Apr 20250.92389 · crossed 0.90
17 May 20250.89725 · crossed 0.90
15 Jun 20260.4176 · crossed 0.50 · scoring model v2026.06.15
12 Jul 20260.44312
Show all 82 observations
18 Dec 20240.00043
17 Mar 20250.83709
31 Mar 20250.84799
9 Apr 20250.92389
10 Apr 20250.92738
18 Apr 20250.92433
20 Apr 20250.92056
28 Apr 20250.9147
29 Apr 20250.91936
1 May 20250.91227
4 May 20250.91936
14 May 20250.9147
15 May 20250.90758
16 May 20250.90648
17 May 20250.89725
1 Jun 20250.88489
2 Jun 20250.88289
3 Jun 20250.87984
4 Jun 20250.89324
15 Jun 20250.88877
17 Jun 20250.89324
1 Jul 20250.87984
2 Jul 20250.87999
3 Jul 20250.87089
4 Jul 20250.88612
5 Jul 20250.88888
7 Jul 20250.88612
8 Jul 20250.88888
13 Jul 20250.88612
14 Jul 20250.88888
16 Jul 20250.88763
20 Jul 20250.88888
21 Jul 20250.88612
24 Jul 20250.89745
1 Aug 20250.88515
4 Aug 20250.89745
5 Aug 20250.88612
7 Aug 20250.88888
8 Aug 20250.88612
16 Aug 20250.87518
21 Aug 20250.87364
23 Aug 20250.86917
24 Aug 20250.87518
1 Sep 20250.85716
6 Sep 20250.87518
10 Sep 20250.87176
23 Sep 20250.87471
24 Sep 20250.88186
1 Oct 20250.86554
4 Oct 20250.88186
5 Oct 20250.87642
7 Oct 20250.88186
13 Oct 20250.88429
1 Nov 20250.86859
4 Nov 20250.88429
18 Nov 20250.89804
21 Nov 20250.88429
1 Dec 20250.86859
4 Dec 20250.88429
1 Jan 20260.86859
4 Jan 20260.88429
25 Jan 20260.88589
1 Feb 20260.87919
4 Feb 20260.88589
18 Feb 20260.88702
26 Feb 20260.88589
1 Mar 20260.87919
4 Mar 20260.88589
7 Mar 20260.87309
21 Mar 20260.87447
3 Apr 20260.86495
20 Apr 20260.87309
21 Apr 20260.8616
7 May 20260.87309
8 May 20260.84979
21 May 20260.84587
23 May 20260.84776
5 Jun 20260.84587
15 Jun 20260.4176
19 Jun 20260.42316
28 Jun 20260.43663
12 Jul 20260.44312

82 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt

The full biography

EPSS 0.44312Published2024-12-17Public PoC2024-12-18Index as of2026-07-12

The record had been public for 1 year, 6 months when this index was last written.

Published 2024-12-17 receipt · Public PoC 2024-12-18 receipt · Index as of 2026-07-12 derived

The pattern, elsewhere

This record is one instance of CWE-367, time-of-check time-of-use (toctou) race condition. The index holds 833 prior instances of this class, 6 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]

CVE-2024-30088 · Microsoft Windows 10 Version 1507only 1 attribute comparableKEV listed · 2024receipt
CVE-2025-22224 · VMware ESXionly 1 attribute comparableKEV listed · 2025receipt
CVE-2025-38352 · Linuxonly 1 attribute comparableKEV listed · 2025receipt
CVE-2022-48618 · Apple tvOSonly 1 attribute comparableKEV listed · 2024receipt
CVE-2023-35311 · Microsoft 365 Apps for Enterpriseonly 1 attribute comparableKEV listed · 2023receipt
CVE-2015-3246nothing comparable heldKEV listed · 2015receipt

"Matches n of m" counts the attributes the two records can both be compared on: the CVSS metrics they share a version of, any weakness class beyond this one, and the vendor. fit-rules@v1

833 records in this class held. The six above are drawn from the ones CISA has listed as exploited, ranked by how much of the record matches this one. That is why every one of them is KEV-listed: the pool is, so the colour on those spokes says nothing the pool has not already said.

No curated product neighbourhood is held for this product, so the records above are the nearest this index can name. The neighbourhood table covers a small set of products and is extended by hand.

Siblings and hubs

Records related to this one

Its defect family

apache software foundation apache tomcat

Of the 4 records in this family that state one, this holds the highest EPSS percentile: 0.98669.

Grouped by shared product and weakness, not by shared vulnerability. Each record's own state is on its own page.

Family membership: held values

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