CVE-2025-13837

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

Score 5.5 from GitHub Security Advisory (severity: LOW) published 2025-12-01. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week
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.

When loading a plist file, the plistlib module reads data in size specified by the file itself, meaning a malicious file can cause OOM and DoS issues

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
11th
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

December 1, 2025

Last Modified

September 3, 2026

Advisory Details (9)

Auto-updated Sep 3, 2026
Patch available. Sources: github_commit, github_pr.
Web page

Mailman 3 [CVE-2025-13837] Out-of-memory when loading Plist - Security-announce - python.org

https://mail.python.org/archives/list/[email protected]/thread/2X5IBCJXRQAZ5PSERLHMSJFBHFR3QM2C/
GitHub pull request

gh-119342: Fix a potential denial of service in plistlib

Fix merged in python/cpython PR #119343 on 2025-12-01 — awaiting tagged release

https://github.com/python/cpython/pull/119343
Web page

Out-of-memory when loading a Plist · Issue #119342 · python/cpython · GitHub

https://github.com/python/cpython/issues/119342
GitHub commit

commit cefee7d118a2 (python/cpython)

Fix landed in python/cpython commit cefee7d118a2 — awaiting tagged release

https://github.com/python/cpython/commit/cefee7d118a26ef6cd43db59bb9d98ca9a331111
GitHub commit

commit b64441e48523 (python/cpython)

Fix landed in python/cpython commit b64441e48523 — awaiting tagged release

https://github.com/python/cpython/commit/b64441e4852383645af5b435411a6f849dd1b4cb
GitHub commit

commit 71fa8eb8233b (python/cpython)

Fix landed in python/cpython commit 71fa8eb8233b — awaiting tagged release

https://github.com/python/cpython/commit/71fa8eb8233b37f16c88b6e3e583b461b205d1ba
GitHub commit

commit 694922cf40aa (python/cpython)

Fix landed in python/cpython commit 694922cf40aa — awaiting tagged release

https://github.com/python/cpython/commit/694922cf40aa3a28f898b5f5ee08b71b4922df70
GitHub commit

commit 5a8b19677d81 (python/cpython)

Fix landed in python/cpython commit 5a8b19677d81 — awaiting tagged release

https://github.com/python/cpython/commit/5a8b19677d818fb41ee55f310233772e15aa1a2b
GitHub commit

commit 568342cfc8f0 (python/cpython)

Fix landed in python/cpython commit 568342cfc8f0 — awaiting tagged release

https://github.com/python/cpython/commit/568342cfc8f002d9a15f30238f26b9d2e0e79036

Vendor Advisories for CVE-2025-13837(10)

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

Patch Availability(10)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhui5/rhua-tp-rhel9:17872412602026-08-24redhat
ubuntupython3.5-venv (3.5.2-2ubuntu0~16.04.4~14.04.1+esm9) @ trusty2026-05-29ubuntu
redhatrhui5/rhua-rhel9:17797982222026-05-27redhat
redhatpython3.12-0:3.12.13-2.el10_22026-05-19redhat
redhatpython3.12-0:3.12.13-2.el9_82026-05-19redhat
redhatpython3.12-0:3.12.13-2.el8_102026-04-27redhat
redhatpython3-11-main-3.11.15-4.hum12026-04-17redhat
redhatpython3-12-main-3.12.13-3.hum12026-04-17redhat
redhatpython3-14-main-3.14.4-1.hum12026-04-11redhat
redhatpython3-13-main-3.13.13-1.hum12026-04-10redhat

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

(9 across 4 ecosystems)
Debian:14(3)
PackageVulnerable rangeFix by version rangeDependents
pypy37.3.19+dfsg-2, 7.3.20+dfsg-1, 7.3.20+dfsg-2, 7.3.20+dfsg-3, 7.3.20+dfsg-4
  • every version up to 7.3.21+dfsg-1: fixed in 7.3.21+dfsg-1
—
python3.133.13.5-2, 3.13.6-1, 3.13.7-1, 3.13.8-1, 3.13.9-1
  • every version up to 3.13.11-1: fixed in 3.13.11-1
—
python3.143.14.0-1 ... 3.14.0~rc3-1 (13 versions)
  • every version up to 3.14.2-1: fixed in 3.14.2-1
—
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
pypy37.3.10+dfsg-1 ... 7.3.9+dfsg-5 (53 versions)
  • every version on: no fix on record
—
python3.93.9.2-1, 3.9.2-1+deb11u1, 3.9.2-1+deb11u2, 3.9.2-1+deb11u3
  • every version up to 3.9.2-1+deb11u4: fixed in 3.9.2-1+deb11u4
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
pypy37.3.11+dfsg-2 ... 7.3.23+dfsg-1 (29 versions)
  • every version on: no fix on record
—
python3.113.11.2-6 ... 3.11.2-6+deb12u6 (7 versions)
  • every version up to 3.11.2-6+deb12u7: fixed in 3.11.2-6+deb12u7
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
pypy37.3.19+dfsg-2 ... 7.3.23+dfsg-1 (11 versions)
  • every version on: no fix on record
—
python3.133.13.5-2
  • every version up to 3.13.5-2+deb13u1: fixed in 3.13.5-2+deb13u1
—

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 12× in last 7d / 30× 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 94 of 174 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. 6 repeat rows among the latest 100 are merged into the row they repeat. The 80 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-10-13 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-12 17:24 UTCEG score recompute
  5. 2026-10-12 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  6. 2026-10-11 20:54 UTCEG score recompute
  7. 2026-10-11 19:54 UTCOSV refresh
  8. 2026-10-11 19:04 UTCEG score recompute
  9. 2026-10-11 15:45 UTCEG score recompute
  10. 2026-10-11 13:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  12. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-10-08 17:08 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-09-26 15:57 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-09-22 14:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
Show 69 more
  1. 2026-09-22 05:46 UTCOSV refresh
  2. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  5. 2026-09-16 05:13 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  6. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  8. 2026-09-12 14:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  9. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  10. 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  13. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  14. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  15. 2026-09-04 13:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  16. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  17. 2026-09-03 03:23 UTCEG score recompute
  18. 2026-09-03 03:23 UTCVendor advisory
  19. 2026-09-03 03:23 UTCGHSA enrichmentGHSA-qhx6-hpfj-8m4g · GitHub severity LOW · GitHub CVSS 5.5
  20. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  22. 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  24. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  26. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  27. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  28. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  29. 2026-08-24 14:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  30. 2026-08-24 14:02 UTCOSV refresh
  31. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  32. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  33. 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  34. 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  35. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  36. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  37. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  38. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  39. 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  40. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  41. 2026-08-12 13:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  42. 2026-08-11 13:41 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  43. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  44. 2026-08-09 13:45 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  45. 2026-08-08 09:01 UTCEG score recompute
  46. 2026-08-08 09:01 UTCVendor advisory
  47. 2026-08-08 09:01 UTCGHSA enrichmentGHSA-qhx6-hpfj-8m4g · GitHub severity LOW · GitHub CVSS 5.5
  48. 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  49. 2026-08-06 13:45 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  50. 2026-08-05 19:16 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  51. 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  52. 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  53. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  54. 2026-08-02 02:25 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  55. 2026-08-01 04:14 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  56. 2026-07-30 16:26 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  57. 2026-07-30 01:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  58. 2026-07-28 15:35 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  59. 2026-07-27 14:12 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  60. 2026-07-26 14:53 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  61. 2026-07-25 14:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  62. 2026-07-24 14:16 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  63. 2026-07-23 14:41 UTCOSV refresh
  64. 2026-07-23 14:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  65. 2026-07-23 02:49 UTCEG score recompute
  66. 2026-07-22 14:07 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  67. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  68. 2026-07-19 14:30 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  69. 2026-07-19 02:28 UTCEPSS rescoreEPSS 0.2% · 9th percentile

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

Frequently asked(5)

What is CVE-2025-13837?
CVE-2025-13837 is a medium-severity vulnerability; its CVE record was published on December 1, 2025. When loading a plist file, the plistlib module reads data in size specified by the file itself, meaning a malicious file can cause OOM and DoS issues
When was the CVE record for CVE-2025-13837 published?
The CVE record for CVE-2025-13837 was published on December 1, 2025. 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 3, 2026; the record at its source may have been updated since.
Is CVE-2025-13837 actively exploited?
CVE-2025-13837 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-13837?
CVE-2025-13837 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2025-13837?
A fix for CVE-2025-13837 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-13837 are linked in the Vendor Advisories panel on this page.

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