CVE-2026-41565

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-28. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers.

The gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three.

Any caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

May 28, 2026

Last Modified

May 29, 2026

Advisory Details (4)

Auto-updated Jun 10, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-41565: CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers

http://www.openwall.com/lists/oss-security/2026/05/28/10
generic

Client Challenge

https://metacpan.org/release/MIK/CryptX-0.088_001
generic
https://github.com/DCIT/perl-CryptX/commit/7e56347d420aaf43b2ee1586f4a230492ccf1642.patch
generic
https://github.com/DCIT/perl-CryptX/commit/57e69e541b0718ca8724c2f61514322a2d859bc1.patch

Vendor Advisories for CVE-2026-41565(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libcryptx-perl0.069-1 ... 0.090-1~bpo13+1 (21 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libcryptx-perl0.077-1 ... 0.090-1~bpo13+1 (16 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libcryptx-perl0.085-1 ... 0.090-1~bpo13+1 (8 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libcryptx-perl0.085-1, 0.087-1, 0.087-2, 0.088-10.089-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 66× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 231 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-41565?
CVE-2026-41565 is a high vulnerability published on May 28, 2026. CryptX versions before 0.088001 for Perl have a stack buffer overflow in four AEAD decryptverify helpers. The gcmdecryptverify, ccmdecryptverify, chacha20poly1305decryptverify and eaxdecryptverify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer…
When was CVE-2026-41565 disclosed?
CVE-2026-41565 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on May 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41565 actively exploited?
CVE-2026-41565 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.1% of all scored CVEs.
What is the CVSS score of CVE-2026-41565?
CVE-2026-41565 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-41565?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41565, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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