CVE-2026-41695

Spring Data Commons applications may be vulnerable to denial of service through resource exhaustion when attacker-controlled property path strings are passed to MappingContext property path resolution.

Affected versions: Spring Data Commons 4.0.0 through 4.0.5; 3.5.0 through 3.5.11; 3.4.0 through 3.4.14.

Spring Data Commons applications may be vulnerable to denial of service through resource exhaustion when attacker-controlled property path strings are passed to MappingContext property path resolution.

Affected versions: Spring Data Commons 4.0.0 through 4.0.5; 3.5.0 through 3.5.11; 3.4.0 through 3.4.14.

src/main/java/org/springframework/data/mapping/context/PersistentPropertyPathFactory.java:175 · Unbounded Resource Allocation (Algorithmic DoS)

Impact

When a consuming module routes user-supplied dot-paths (sort parameters, projection paths, PATCH paths) through MappingContext.getPersistentPropertyPath(String, Class), each distinct string — including invalid ones — is cached forever. A remote attacker can send millions of requests with unique ?sort=aaaa<n> values and grow the heap until the service OOMs.

Description

PersistentPropertyPathFactory.propertyPaths (line 53) is a ConcurrentHashMap<TypeAndPath, PathResolution> populated by getPotentiallyCachedPath() (line 174-177) via computeIfAbsent. The key is (TypeInformation, rawPathString). Crucially, unresolvable paths are also cached (as PathResolution.unresolved, line 204) so that the same InvalidPersistentPropertyPath can be re-thrown — meaning every distinct garbage string an attacker sends creates a permanent entry. There is no eviction. This is reachable from AbstractMappingContext.getPersistentPropertyPath(String, Class) (AbstractMappingContext.java:345), which Spring Data REST and several store query mappers call with HTTP-request-derived sort/filter property names.

By contrast, the sibling SimplePropertyPath.cache was already hardened to use ConcurrentReferenceHashMap (soft refs); this cache was not given the same treatment.

Exploit scenario

Against a Spring Data REST endpoint, an attacker scripts GET /things?sort=<random-40-char-string> in a loop. Each request fails fast with InvalidPersistentPropertyPath, but each distinct random string leaves behind a TypeAndPath key, a PathResolution object holding the split segments list, and the source string in the map. After ~10M requests the JVM OOMs.

Preconditions

• A downstream component (Spring Data REST, a store-specific QueryMapper, or application code) passes externally-supplied strings to MappingContext.getPersistentPropertyPath(String, ...)
• No upstream rate-limiting or path-string validation

How to fix

A cache whose key can be derived from external input must be bounded. Replace propertyPaths (line 53) with a ConcurrentLruCache<TypeAndPath, PathResolution> of fixed capacity, or ConcurrentReferenceHashMap (matching the sibling SimplePropertyPath.cache). Additionally, do not cache PathResolution.unresolved results at all (line 204 in createPersistentPropertyPath) — re-computing a failed lookup is cheap, and caching negative results for arbitrary attacker strings is what makes this exploitable.

Adversarial verification

Verdict: TRUE_POSITIVE (confidence: 7/10) — unbounded hard-ref ConcurrentHashMap keyed by raw path string, caches unresolved entries (line 204), reachable via public MappingContext.getPersistentPropertyPath(String, ...); sibling PropertyPath cache was already converted to soft-refs but this one was missed. -3 confidence because the HTTP-input wiring lives in downstream modules (Spring Data REST / store mappers), not verifiable in this repo.

Code at the line — CONFIRMED

• Line 53: private final Map<TypeAndPath, PathResolution> propertyPaths = new ConcurrentHashMap<>(); — plain CHM, hard refs, no eviction, no size bound.
• Line 175: propertyPaths.computeIfAbsent(TypeAndPath.of(type, propertyPath), ...) — every distinct (type, string) pair is inserted.
• Line 204: return PathResolution.unresolved(parts, segment, type, currentPath); — returned from inside computeIfAbsent's mapping function, so unresolvable paths are cached. The PathResolution retains the full attacker string (source = StringUtils.collectionToDelimitedString(parts, "."), line 452).

Callers within spring-data-commons

• AbstractMappingContext.getPersistentPropertyPath(String, Class<?>) (line 345) and (String, TypeInformation<?>) (line 350) → persistentPropertyPathFactory.from(type, propertyPath)…

Spring Data Commons applications may be vulnerable to denial of service through resource exhaustion when attacker-controlled property path strings are passed to MappingContext property path resolution.

Affected versions: Spring Data Commons 4.0.0 through 4.0.5; 3.5.0 through 3.5.11; 3.4.0 through 3.4.14.

Spring Data Commons applications may be vulnerable to denial of service through resource exhaustion when attacker-controlled property path strings are passed to MappingContext property path resolution.

Affected versions: Spring Data Commons 4.0.0 through 4.0.5; 3.5.0 through 3.5.11; 3.4.0 through 3.4.14.

src/main/java/org/springframework/data/mapping/context/PersistentPropertyPathFactory.java:175 · Unbounded Resource Allocation (Algorithmic DoS)

Impact

When a consuming module routes user-supplied dot-paths (sort parameters, projection paths, PATCH paths) through MappingContext.getPersistentPropertyPath(String, Class), each distinct string — including invalid ones — is cached forever. A remote attacker can send millions of requests with unique ?sort=aaaa<n> values and grow the heap until the service OOMs.

Description

PersistentPropertyPathFactory.propertyPaths (line 53) is a ConcurrentHashMap<TypeAndPath, PathResolution> populated by getPotentiallyCachedPath() (line 174-177) via computeIfAbsent. The key is (TypeInformation, rawPathString). Crucially, unresolvable paths are also cached (as PathResolution.unresolved, line 204) so that the same InvalidPersistentPropertyPath can be re-thrown — meaning every distinct garbage string an attacker sends creates a permanent entry. There is no eviction. This is reachable from AbstractMappingContext.getPersistentPropertyPath(String, Class) (AbstractMappingContext.java:345), which Spring Data REST and several store query mappers call with HTTP-request-derived sort/filter property names.

By contrast, the sibling SimplePropertyPath.cache was already hardened to use ConcurrentReferenceHashMap (soft refs); this cache was not given the same treatment.

Exploit scenario

Against a Spring Data REST endpoint, an attacker scripts GET /things?sort=<random-40-char-string> in a loop. Each request fails fast with InvalidPersistentPropertyPath, but each distinct random string leaves behind a TypeAndPath key, a PathResolution object holding the split segments list, and the source string in the map. After ~10M requests the JVM OOMs.

Preconditions

• A downstream component (Spring Data REST, a store-specific QueryMapper, or application code) passes externally-supplied strings to MappingContext.getPersistentPropertyPath(String, ...)
• No upstream rate-limiting or path-string validation

How to fix

A cache whose key can be derived from external input must be bounded. Replace propertyPaths (line 53) with a ConcurrentLruCache<TypeAndPath, PathResolution> of fixed capacity, or ConcurrentReferenceHashMap (matching the sibling SimplePropertyPath.cache). Additionally, do not cache PathResolution.unresolved results at all (line 204 in createPersistentPropertyPath) — re-computing a failed lookup is cheap, and caching negative results for arbitrary attacker strings is what makes this exploitable.

Adversarial verification

Verdict: TRUE_POSITIVE (confidence: 7/10) — unbounded hard-ref ConcurrentHashMap keyed by raw path string, caches unresolved entries (line 204), reachable via public MappingContext.getPersistentPropertyPath(String, ...); sibling PropertyPath cache was already converted to soft-refs but this one was missed. -3 confidence because the HTTP-input wiring lives in downstream modules (Spring Data REST / store mappers), not verifiable in this repo.

Code at the line — CONFIRMED

• Line 53: private final Map<TypeAndPath, PathResolution> propertyPaths = new ConcurrentHashMap<>(); — plain CHM, hard refs, no eviction, no size bound.
• Line 175: propertyPaths.computeIfAbsent(TypeAndPath.of(type, propertyPath), ...) — every distinct (type, string) pair is inserted.
• Line 204: return PathResolution.unresolved(parts, segment, type, currentPath); — returned from inside computeIfAbsent's mapping function, so unresolvable paths are cached. The PathResolution retains the full attacker string (source = StringUtils.collectionToDelimitedString(parts, "."), line 452).

Callers within spring-data-commons

• AbstractMappingContext.getPersistentPropertyPath(String, Class<?>) (line 345) and (String, TypeInformation<?>) (line 350) → persistentPropertyPathFactory.from(type, propertyPath)…